Klugman first rose to prominence when she won the prestigious Orange Bowl junior championships in Florida as a 13-year-old. Past winners include world number seven Coco Gauff and 18-time major singles winner Chris Evert.
In 2025, she became the first Briton in almost 50 years to reach the French Open girls’ final, losing in straight sets to Lili Tagger.
She has also contested two Grand Slam girls’ doubles finals at Wimbledon in 2023 and the 2025 Australian Open.
She made her WTA Tour main-draw debut in Nottingham last year and made her first Wimbledon appearance a few weeks later, losing both singles matches.
Klugman’s serve was particularly impressive against Dart, with the teenager hitting six aces to zero double faults and winning 77% of first-serve points.
After a strong first set, Klugman found herself 4-2 down in the second, but reeled off four games in a row to secure victory.
The only Briton to make the second round in Nottingham, Klugman will face fourth seed Marie Bouzkova next.
Fellow Briton Alicia Dudeney, who also received a Wimbledon main-draw wildcard, lost 6-4 7-6 (7-2) to Ukraine’s Dayana Yastremska.