bemoans

Centre-back Liam Scales had by far the most touches of any Celtic player with 121, well ahead of left-back Kieran Tierney (79) and goalkeeper Sam Johnstone (69).

Goalscorer Baur admitted they did not do enough to win and was at a loss when asked what needs to change. “How we played second half, last 30 minutes, we deserved it in the end,” Baur said.

When asked if he knew why his team collapsed in such a manner, he responded: “I cannot tell you, sorry.

“It can happen that you get a goal, they can score too, good team – you should then get control back, hold the ball a bit longer to take the momentum away from them. You should break that.”

Celtic did not get control back, did not break Celta’s momentum and ultimately paid the price.

“I don’t think Celtic are good enough, individually and collectively, to take on a team that’s eighth in La Liga,” former Celtic goalkeeper Pat Bonner said on Sportsound.

“They moved the ball really well and Celtic couldn’t get close to them.

“They are not good enough at this level. Celtic are paying big money for some players because the fans are demanding it and then they come in and aren’t good enough.”

Their next European outing comes on 5 November as they host Besiktas, trying to reverse their continental woes. Whether they can or not is another matter.

Traditionally, international sides have played six games across three windows – all of which have featured two fixtures – in September, October and November.

But for the first time this year, the September and October breaks were merged.

Wales’ hopes of coping with the new schedule were not helped by a string of injuries, with stars such as Karl Darlow, Joe Rodon, Dylan Lawlor and Harry Wilson missing the entire camp and David Brooks dropping out of the squad after defeat by Portugal in the opening game.

Bellamy said Dan James was not fit enough to play against Denmark after he was left on the bench at the Cardiff City Stadium, and acknowledged Ben Davies probably should have been rested after he was withdrawn late on.

“If we have a few injuries, which we had more than one or two, they miss four games,” said Bellamy.

“We can deal with two, do you understand? And then the squad will get really tested. The intensity of the squad, the athleticism, really I think [the four-game break] is designed for the elites.

“[They can] say, we can go, we can go, we can turn over these games really, really quickly and we can change, we can change [the team] like for like because we have the numbers. So, it puts a real stress on a lot of us.”