Spurs manager Mauricio Pochettino has urged his players to walk out with a smile on their faces against Barcelona.
Tottenham will resume their Champions League campaign at a sell-out Wembley Stadium on Wednesday without five first-team regulars, having lost their opening group game against Inter Milan.
Jan Vertonghen, Mousa Dembele, Christian Eriksen, Dele Alli and Serge Aurier will all miss out against the Spanish champions, although Hugo Lloris will return in goal and Pochettino wants his team to relish facing Lionel Messi.
“It’s about enjoying the game tomorrow and the best player in the world in Messi,” he said.
“Football is not a drama but always it’s about being focused, competitive and enjoying playing against the best player in the world.
“Be optimistic and be happy and smile when you go on the pitch. Don’t be too serious.”
Pochettino accepts Messi will be Barcelona’s biggest threat.
“It’s very clear, very simple, we need to be near him when he gets the ball,” he added.
“If we leave him space he will get away from his marker. What we need is to have players helping each other. We need to demand sacrifice and they will expend a lot of energy.”
”The evolution of the team is there and everyone can appreciate that and see it. We are working hard to keep the level and compete. The ambition, of course, is to win. However, the reality and the dream are perhaps not in balance today.
“We can only focus on Barcelona and then see at the end of the season.
“It’s the most difficult season for us. All of this makes you more cautious about guessing what is going to happen.”