The Three Lions manager named a 28-man squad for Nations League matches against Italy and Germany later this month – the last international fixtures before the World Cup in Qatar.
With the World Cup starting in just a couple of months, players will be desperate to perform well in the upcoming matches and stake a claim to be included in Southgate's final squad.
Harry Maguire and Shaw have both been included in the England squad for the matches against Italy and Germany, which has led to Southgate facing criticism given the pair are not getting regular minutes for United this season. While Arsenal legend Merson believes that Maguire was still a good pick for the Three Lions, he doesnt understand why Shaw was selected.
“Not with Harry Maguire I wasnt [surprised], I think hes a big part of the England squad, the way they play and with Gareth,” Merson told Sky Sports. “I was shocked with the Luke Shaw one, if Im being honest. The amount of full-backs we have in this country and talented full-backs at that. I was shocked with that. But not the Harry Maguire one.
“I dont think theres a lot of panic but if Harry Maguire doesnt get in the United team come November then theres going to be a major worry for Gareth Southgate. In a way, he shouldve brought some players in that he might have to go to because you cant go three months without playing football then play international football, especially in the heat theyre going to be playing in.”