PER-FECT WITH THREE LIONS

is capable of. He has made some good decisions, both for himself and health-wise, to evolve and get better as a person and also as a player.

“It’s all coming together now and it’s clear he’s been challenging himself every day.

“He’s a positive influence on the whole team and that’s what I require from everyone in this squad.

“Jack is a perfect example of that. He’s had his setbacks, he’s had his difficult times, but he’s battled back from them. Nothing was given to him – he’s worked hard for it and reaping the rewards.”

And Mertesacker cannot see many England midfielders who can rival the mental strength and technical ability of his club-mate.

“He is a must for England,” said the gigantic German, 33.

“In the time I’ve known him he has matured big time. He takes advantage of the opportunity he has every single day now. That means sleeping well, eating well and training well.

“Now he can really step up. He’s never lost his calmness on the ball, his vision nor his cleverness. Now he can build on that with everything he’s learnt and it’s brilliant to see an English player evolve like that and really try to improve and make things happen.

“Going through what he has, with all the injuries, it has certainly made him tougher.” BIG GUNS: The Arsenal pair