England manager Gareth Southgate has confirmed Tottenham defender Kyle Walker is a doubt for Friday's (11 November) World Cup qualifier with Scotland.
Walker, 26, picked up a knock midway through the second half of his side's 1-1 draw with Arsenal on Sunday 6 November and was replaced by Kieran Trippier with 10 minutes of the contest remaining.
Speaking post-match, Mauricio Pochettino was unsure whether the injury was serious or not but within hours, the right-back was named in the Three Lions squad for upcoming games with Scotland and Spain.
Speaking at a press conference on Monday, England boss Southgate confirmed there were some concerns over Walker's fitness, but explained he has selected squad equipped with enough options should the Spurs full-back not recover in time.
"We have named 25 for that reason, because there are a couple of knocks from yesterday that we are not totally sure about," Southgate told a press conference on Monday.
With concerns over Walker, his Spurs teammate Ben Davies meanwhile has withdrawn from the Wales squad for their upcoming World Cup 2018 qualifier with Serbia.
The left-back suffered the injury in his side's defeat to Bayer Leverkusen in the Champions League last Wednesday and missed the 1-1 draw with Arsenal as a result.
The Welsh FA have now confirmed Bristol City defender Adam Matthews has been called into replace the Spurs man in Chris Coleman's squad.
Dele Alli will also remain in north London over the next week. The 20-year-old suffered a knee injury during a training session on Saturday that ruled him out of the clash with Arsenal and was subsequently left out of Southgate's England squad.
"It was bad luck yesterday in the training session, he twisted his knee. We need to assess him today and tomorrow," Pochettino said of Alli's injury. "He'll be out for a few weeks. We hope it is not a big issue. It is bad luck. He was in the team, he is an important player, but that is football."