England full-back Kieran Trippier is expected to miss the trip to Camp Nou after a recurrence of his troublesome groin injury, meaning Walker-Peters could be left with a daunting assignment against the likes of Ousmane Dembele – although Barcelona boss Ernesto Valverde has hinted Lionel Messi may be rested with his side already through.
"The squad is the most important. Today Kyle Walker-Peters had the responsibility to play. If they [Trippier and Aurier] are not ready Kyle is going to play," Pochettino told BT Sport .
"He is a great player, younger, but he is going to give his best if we need to play with him."
"There are a lot of games to play. We still haven't finished this half of the season," the Argentinian said, pondering his team's prospects in the title race.
"The gap is five and six points. If you compare to last season it is a much better gap. We reduced that gap.
"But that doesn’t mean anything because it is a long way to the go in the season. The most important thing is to be there in the last six or seven games of the season to fight.
"We are going to try. We are going to be solid and show that we deserve to be there."