Dele Alli was rested to keep him fresh for Tuesday as Erik Lamela, Lucas Moura and Harry Kane put Spurs 3-0 up on Saturday.
Mousa Dembele also limped off early on with an ankle injury, which now leaves Spurs without three central midfielders since Eric Dier and Victor Wanyama are also out of action.
Tottenham Hotspur held on nervously to beat Wolverhampton Wanderers 3-2 away in the Premier League on Saturday after conceding two second-half penalties. Those are things we need to be careful about, we need to have more discipline and be more responsible.
"We need to learn", he said. You need to be respectful with the football.
UEFA Champions League regulations state the visiting club and match officials be allowed to train on the match pitch for no longer than an hour the day before a game. 'We've both got to play on it'.
Harry Kane's eighth goal of the season gave the visitors a 3-0 lead before they almost crumbled under intense pressure from the hosts.
Tottenham were clinical in the final third - eight of their 10 shots were on target - and they escaped from a hard match with all three points, taking advantage of the draw between Arsenal and Liverpool.
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Seven of Tottenham's 11 top-flight matches so far have been away from home, and their next one is at Crystal Palace's Selhurst Park.
Their best opportunity from open play came in between the two penalties when Morgan Gibbs-White, influential off the bench, picked the run of Costa with a perfectly-timed through ball from which the winger prodded wide. "We'll play the way we normally play - front foot, press, trying to attack. Are we going to have the possibility to fix problems or are we going to manage in the same way?" "It's about communications, feelings and is more up to the players".
On an evening when the depth of his squad seemed at risk of being exposed with an injury to Mousa Dembele and a shaky Premier League debut by Juan Foyth, Tottenham manager Mauricio Pochettino saw his side nearly contrive to throw away a 3-0 lead.
"I want to hear them say: 'I want to play for Tottenham, to make history, to touch glory with this badge'".
"We play in one way and it demands a lot of energy and concentration", said the Frenchman.
"It is worse when there are American football games a few days before but we need to accept that and we can not complain".