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Europe has long been the primary target for US President Donald Trump’s tirades against traditional allies. However, Asia got a taste of this treatment last month when he cut short, at very short notice, the annual “Ulchi Freedom Shield” US military drills with South Korea.

Seoul is still angry at this development, especially given Trump’s later confirmation that he would also try to arrange a meeting with North Korea’s supreme leader, Kim Jong Un, in coming months. Signs of this frustration included President Lee Jae Myung’s call to speed up the development of new nuclear-powered submarines and his push to regain presidential wartime operational control of South Korean forces from the US, insisting that enhanced domestic military capabilities were needed in parallel with the alliance with Washington.

As remarkable as Trump’s decision was, it only confirmed the degree to which US partnerships with traditional allies have changed during his presidencies, as Washington demands wider concessions in return for US collaboration. These White House expectations include not only huge investments in the US, but also support in a conflict with Iran that has failed to unseat the regime in Tehran, while causing the largest global energy shock in a generation.

Certainly, some agree that Trump has legitimate concerns about South Korea. However, the manner in which he expressed his disagreement, in such a publicly humiliating way, is self-defeating. The US president said he told his South Korean counterpart that “we have 39,000 soldiers over there, guarding you from Kim Jong Un, your next-door neighbor, and you’re not going to help us on a very easy military operation in Iran? That’s strange.”

As ever, Trump’s statement requires a fact check. Currently, Seoul is scheduled this year to pay Washington about $1.19 billion of the estimated $5.5 billion-$6 billion it costs to station approximately 28,500 US troops in South Korea.

Even though that $1.19 billion sum represents a significant increase, Trump claimed that during his first term, Seoul pledged to pay much more: $3 billion. He further contends that the Biden administration failed to follow up on this pledge.

Trump’s decision to end the latest US-South Korea military exercises on Aug. 21 rather than Aug. 27, as scheduled, was embarrassing enough for Seoul. To also confirm that he planned to try to arrange another meeting with Kim was rubbing salt in the wounds.

His tirade has set back recent and extensive efforts by his team to reassure Asian allies about the US commitment to the region. At a recent meeting of Association of Southeast Asian Nations foreign ministers in the Philippines, for instance, Secretary of State Marco Rubio pledged about $2.5 billion of strategic investments in Southeast Asia. During a speech at Singapore’s Shangri-La conference in May, US Secretary of Defense Pete Hegseth emphasized the importance of the region to Washington.

White House expectations include not only huge investments in the US, but also support in a conflict with Iran.

Andrew Hammond

Asian allies also query the utility of reengaging with Kim, after Trump’s first three meetings with him, between 2017 and 2021, failed to deliver any diplomatic breakthroughs.

White House expectations include not only huge investments in the US, but also support in a conflict with Iran.

Andrew Hammond

The prospects appear slim for any sustained de-escalation of tensions in the world’s last Cold War-era frontier in the form of the prize of a verifiable, comprehensive denuclearization of North Korea. Pyongyang’s weapons program has only grown in size and sophistication since Trump’s first term. This potentially widens the negotiating divide between the two sides.

The central challenge in making any meaningful diplomatic process with Kim is, as it was during Trump’s first term, the differing US and Korean interpretations of what exactly would constitute “denuclearization” of the peninsula.

To Trump, this appears to mean unilateral North Korean disarmament. For Kim, it appears to be more about potentially lengthy negotiations in which Pyongyang should be treated as an equal to the US, providing him with the further potential for propaganda victories. In this context, Kim will continue to be wary of commitments on specific time frames, and will want to win further concessions from Trump before agreeing to any reduction in nuclear capabilities, let alone committing to full denuclearization.

As was the case during Trump’s first term, it is far from clear what, if any, sequencing is possible to move the process forward. After the last meeting between Trump and Kim, North Korea disputed the US assertion that the reason the talks collapsed was because Kim demanded a full roll-back of sanctions. Pyongyang said it asked only for partial sanctions relief, and that an offer had been made to permanently halt nuclear and long-range rocket testing.

One reason Pyongyang’s position will not shift far or fast is that it was Kim, not Trump, who emerged as the bigger beneficiary of their previous engagements. The North Korean leader made few concrete concessions while Trump called off US-South Korea military exercises, and held out the prospect of an easing of sanctions on Pyongyang if it did “something meaningful” on denuclearization.

Taking all of this together, the damage to US alliances in Asia from last month’s decisions therefore goes far beyond South Korea and might outlast Trump’s second term. The paradox is that the White House had spent much time in recent months reassuring allies of enduring US support for the region, efforts that have now been badly set back.

• Andrew Hammond is an associate at LSE IDEAS at the London School of Economics.

Enjoy it – and do what Serena Williams tells you to.

That was how Carlos Alcaraz settled back into competitive action at the US Open, partnering the American great as she returned to her home slam after a four-year absence.

The tournament’s revamped mixed doubles format has attracted criticism for favouring the allure of the sport’s top singles stars at the expense of established doubles players.

But the crowds turned out and produced a terrific atmosphere for the tournament’s headline act, with about 15,000 people packed inside Arthur Ashe Stadium.

All four doubles specialist pairings lost to a team of singles players on Tuesday, while Alcaraz and Williams fell in the quarter-finals.

Seven-time major winner Alcaraz was playing his first competitive match since April after injuring his wrist, while 23-time Grand Slam champion Williams was competing in New York for the first time since she “evolved away” from tennis in 2022.

The pair were greeted by huge cheers and were roared on throughout their opening 5-3 4-1 win against Great Britain’s Lloyd Glasspool and New Zealand’s Erin Routliffe.

The 44-year-old Williams won the US Open mixed doubles title in its original format alongside Max Mirnyi in 1998 – five years before Alcaraz was born.

Almost 30 years later, Williams still had the competitive desire. She and Alcaraz enjoyed the occasion, playing with smiles on their faces and roaring each other on after winning a point.

Interviewed during a change of ends, Alcaraz said: “I’m playing next to the one and only Serena Williams, so what else can I do? Just enjoy and try to do the things she told me to do.”

Their partnership improved rapidly in their first match as they won eight of the final nine games to seal victory.

However, they were denied a place in Wednesday’s semi-finals by Italy’s world number six Flavio Cobolli and Swiss team-mate Belinda Bencic, who won 5-4 (7-4) 4-1.

The 23-time Grand Slam champion will not be playing singles, but could team up with her older sister Venus for doubles.

Serena Williams will team up with Carlos Alcaraz to create a powerhouse mixed doubles pair on her return to the US Open.

The US Tennis Association announced on Saturday that Williams and Alcaraz had been given a wild card into the tournament. The mixed doubles main draw begins on Tuesday, with the winning team sharing $1 million.

It will be Williams’s first time playing at the US Open since 2022. The 23-time Grand Slam singles champion returned to tennis this summer.

“Let’s gooooo!” Alcaraz posted on X, with a fire emoji and tagging Williams.

Williams is not planning to play singles in New York. The USTA had been holding one women’s wild card, presumably in case Williams wanted it. However, the tournament announced on Saturday that it had been given to American Sofia Kenin, the 2020 Australian Open champion.

Williams played singles at Wimbledon but sustained a knee injury in her first-round loss. She played doubles with older sister Venus at the Cincinnati Open, and they could still opt to play together at the US Open.

Alcaraz announced this week he would return to defend his US Open singles title after being sidelined since April with a right wrist injury.

Serena Williams won a mixed doubles title at the US Open even before winning any of her six singles titles there. She teamed for the 1998 championship with Max Mirnyi, who now works with top-ranked woman Aryna Sabalenka.

The mixed doubles tournament is far different now, as the USTA revamped it last year to make it a two-day, 16-team event it hoped would draw top singles players.

Few are bigger than Williams and Alcaraz, the two-time US Open men’s champion who is ranked number two.

The USTA also announced a number of updates to the field after some players withdrew from the competition.

Americans Jessica Pegula and Taylor Fritz will team up, after their previous partners, Jack Draper and Elena Rybakina, pulled out with injuries. The teams of Emma Navarro and Tommy Paul, along with Karolina Muchova and Jakub Mensik, were given the remaining two wild cards into the main draw.

Diana Shnaider remains in the field and will be given a chance to find a new partner after Daniil Medvedev withdrew.

US Open mixed doubles teams: Sabalenka and Novak Djokovic, Pegula and Fritz, Iga Swiatek and Casper Ruud, Belinda Bencic and Flavio Cobolli, Amanda Anisimova and Learner Tien, two-time defending champions Sara Errani and Andrea Vavassori, Alex Eala and Felix Auger-Aliassime, Leylah Fernandez and Frances Tiafoe, Taylor Townsend and Alexander Zverev, Elina Svitolina and Gael Monfils, Williams and Alcaraz, Muchova and Mensik, and Navarro and Paul.

The remaining two spots will be determined through an eight-team qualifying tournament on Monday.

The USTA gave wild cards to the teams of Mirra Andreeva and Andrey Rublev, and Peyton Stearns and Christian Harrison, to be part of that field.

It is otherwise largely made up of the traditional doubles specialists who lost out on the chance to play in the US Open last year, with direct entry based on the players’ combined singles ranking.

Jeremiah Azu, Dina-Asher Smith, Zharnel Hughes and Amy Hunt combine to win gold for Great Britain in the first mixed 4x100m relay at the European Athletics Championships.

Hunt became the first athlete to win four European golds at one championships while Dina Asher-Smith secured a record eighth European career title.

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