Liverpool midfielder returns to club after injury sustained during international training
Adam Lallana's England return has come to a premature end after a groin strain sustained in the first training session led to his withdrawal from the squad.
Last season's injury issues cost the 30-year-old a place in the squad that reached the World Cup semi-finals over the summer.
Lallana was recalled for the upcoming UEFA Nations League clash with Spain and friendly against Switzerland, but the Liverpool attacking midfielder will have to wait to add to his 34 caps.
He started Tuesday's session at St George's Park but had to leave with a groin complaint that has now led to his withdrawal.
A statement from the Football Association read: "Adam Lallana has returned to his club for further assessment of a groin strain.
"The Liverpool player was withdrawn from training earlier this afternoon and will play no part in England's forthcoming fixtures against Spain and Switzerland."
Lallana's injury setback is a blow for a player that had worked with the Three Lions throughout their World Cup preparation camp, only to watch the finals from afar.
The attacking midfielder is the second player to withdraw from Gareth Southgate's squad after Manchester City's Raheem Sterling pulled out on Monday evening with a back problem.
England have yet to confirm whether the group of 21 will be added to, but Dominic Solanke was brought up from the England Under-21s squad to bolster numbers in training on Tuesday.
It was the Three Lions' first session since the World Cup and one that those involved in Premier League action on Sunday left early, including rejuvenated Manchester United left-back Luke Shaw.