Jose Mourinho believes Chelsea still have an excellent chance of progressing to the UEFA Champions League semi-finals after a 1-1 draw at home to Valencia.
The quarter-final first leg at Stamford Bridge ended all-square after Didier Drogba cancelled out David Silva's stunning first-half strike.
Chelsea must score at least once in Spain next week and Mourinho is confident his side can advance despite only drawing the home leg.
"It is open," Mourinho told a website.
"Normally a team that plays at home considers a victory a good result and a draw a bad result but with a draw everything is open and we can go to Valencia and reach the semi-finals.
"I believe they believe they are in a better position now because they are at home (in the second leg) but why not win in Valencia or get a draw and go into extra time?
"We need to play well. We know the atmosphere we will get there so we need a good referee too.
"This result still gives us one more week to believe we can progress in the Champions League."
Mourinho believes the first leg took a lot out of both sides, with Chelsea pushing for victory late in the second half.
"It was a tough game for both teams, both teams are really tired I believe," he said.
"Chelsea because we tried to change the result and fought a lot to do it and Valencia because they defend, well organised and with a lot of commitment."
Meanwhile, Mourinho was pleased to see Joe Cole return to action as a 74th minute substitute after four months out with a broken foot.
He added: "It is important he is back, of course he is not ready to play more than he did but at least we have him."
knowing mourinho he will do anything to win. he is one daring risk taker. valencia will be punished is they try to hold to a goaless draw
VALENCIA WILL PWN THE ASS OF CHELSEA SO BAD