Murray Davidson knows St Johnstone are just one slip away from blowing their Europa League hopes against Eskisehirspor at McDiarmid Park on Thursday night.
The Perth men go into the second leg of their second qualifying round trailing by two goals from the first encounter in Turkey.
While Davidson, 24, takes plenty of encouragement from the performance in the first leg, he knows the concession of a goal would all but end their hopes of facing French side Marseille in the next round.
"If they were to score in the first 20 minutes or whatever time it may be, it would be a massive bonus for them," said the midfielder. "So we have to make sure we keep it tight at the back to give ourselves any chance.
"We have got to be confident. We watched the match on television and they scored with two deflections.
"After the game there was a sense of disappointment that we had lost 2-0. It wasn't as if they had five or six chances and we were relieved with the scoreline.
"We were disappointed and after watching the game on video again, we believe that if we are 100% focused we can cause them problems.
"If we can get the first goal tomorrow then it's game on."
Eskisehirspor coach Ersun Yanal took his squad for a training session at McDiarmid Park on Wednesday night but before that, in the pre-match press conference, he was the model of diplomacy.
Speaking through an interpreter, he said: "Of course we have an advantage but we have great respect for St Johnstone and it will be difficult."