Gareth Southgate says he is facing a “complicated” Euro 2024 selection choice given England’s potential fitness and availability issues heading into the summer.

This is the first time since the 2018 World Cup that the 57-cap former defender is having to pick a 23-man squad for a major tournament after it was expanded to 26 following the coronavirus pandemic.

But Southgate could name even more than that at the provisional squad announcement on May 21 as the England boss will have injury concerns to deal with and the late arrival of key players.

The final squad is not due to be submitted to UEFA until June 8, but some may not even have joined up with the team by that point due to cup finals, denting numbers for the warm-up friendlies against Bosnia and Iceland.

Asked how many extra headaches returning to a 23-man squad will throw up given the issues he is juggling, Southgate said: “Yeah, it’s going to be complicated, because firstly the injury situations that we have.

“Some will be back playing at the weekend, some will be back playing in a couple of weeks, some will be really close to the end of the season.

“Then we’re going to have the European finals, the FA Cup final and the two friendlies that we’ve got ourselves.

“It’s inevitable we’re going to be naming a longer squad, which is what we did before the Euros here even though we were dealing with 26 then.

“We really don’t know (how many will be in the provisional squad) because there are so many questions on the injuries at the moment.

“But we’ve gained valuable information about so many players this this week.”

Absentee-hit England suffered their first defeat in 15 months in Saturday’s late 1-0 loss Brazil at Wembley, where Jude Bellingham scored an even later goal to salvage a 2-2 draw against Belgium three days later.

Southgate had to experiment far more than he expected during the friendly double-header due an unprecedented injury list that left him without a third of the 40-odd players on his long list against Brazil.

Bukayo Saka, Harry Kane, Harry Maguire, Kyle Walker and Sam Johnstone all withdrew from the squad over the course of the camp, with Jordan Henderson unable to feature in either match.

“I had a plan on Saturday night for Tuesday that got blown apart in 12 hours, so to have a plan for something in two and a half months’ time at the moment is faintly ridiculous.” Southgate said.

“We know some of the core parts of that, we know who’s been able to play at that level, who our very best players are.

“And the rest, we’ve got a lot clearer picture of what people are capable of from the two games that we’ve played.

“We’re just going to see how people are when they come back into form, whether they can do that fitness-wise with their clubs.”

Anthony Gordon, Ezri Konsa and Kobbie Mainoo all made their debuts over recent days, with Ivan Toney registering his first goal – from the penalty spot – against Belgium on his first international start.

The quartet boosted their chances of making the plane to Germany, with 18-year-old Mainoo’s stock arguably growing the highest.

The Manchester United talent staked his claim for a midfield spot with out-of-sorts Kalvin Phillips omitted, Trent Alexander-Arnold injured and Henderson unavailable.

Mainoo won his first cap off the bench against Brazil and, just four months after making his first Premier League start, was named player of the match for his display on his full England debut on Tuesday.

“He gives us a different profile of midfield player to anything else we’ve got,” Southgate said.

“He’s adapted and adjusted brilliantly. You can’t believe his age, really, that he’s just taking it all in his stride as he has.”

Asked if he was confident Mainoo could shut out the noise after such an impressive full debut, he said: “I think, firstly, he seems very mature, very calm. He knows he’s making his way.

“We’re absolutely delighted with what he’s done, first and foremost, and then there’s a lot of the season still to be played with his club.”