Heurelho Gomes believes Tottenham need to be more disciplined in their return date with Real Madrid.
Spurs saw two moments of madness from Peter Crouch cost them dear on Tuesday, as his early red card left Harry Redknapp's men with a mountain to climb.
They were already one goal down by the time the England striker departed on 15 minutes, and went on to concede a further three goals in the second half.
Tottenham now have it all to do in the second leg of their UEFA Champions League quarter-final if they are to prolong their European adventure.
Brazilian keeper Gomes acknowledges that Spurs did themselves few favours at Santiago Bernabeu in midweek and hopes there will be no further rushes of blood when Real arrive at White Hart Lane next Wednesday.
He said: "In the second leg we need to be more careful. If you challenge like a novice at the start of the game, it is hard.
"We need to think about it [our discipline] because it is not the first time. At half-time, Peter said sorry to everyone but we do not blame him.
"It is not his fault. He has been so important for us this season. We just need to move on now."
Two goals from Emmanuel Adebayor, one from Angel Di Maria and a late volley from Cristiano Ronaldo put Tottenham to the sword in the Spanish capital.
Clawing back a four-goal deficit will be a tough ask for Spurs, but Gomes insists they will be giving it their best shot.
"It is going to be difficult for us to turn it around, but we have a chance," he added.
"When you have a chance you need to believe straight away and keep going, but I think we are playing for pride."