Joe Hart claims Manchester City's best is yet to come as they bid to fight off Paris Saint-Germain in their battle for a Champions League semi-final spot.
The two sides have it all to play for in the second leg of their last-eight tie at the Etihad Stadium next week after a frantic 2-2 draw at the Parc des Prince.
Fernandinho's 72nd-minute equaliser gave City the advantage of a second away goal, but after a breathless first clash littered by errors from both sides, goalkeeper Hart knows improvement is necessary.
Hart, who saved an early penalty from Zlatan Ibrahimovic, said: "There is definitely an opportunity there, but 2-2 is no foregone conclusion.
"It is going to be another open game - two very positive teams playing against each other.
"They are a good team, they are dangerous, but we are always going to believe we are a good team. We have a lot of good players and there is lot more to come from us."
Hart's spot-kick stop was his sixth from the last 11 he has faced for club and country and offered early justification for the decision to play him after rushing back from a calf injury.
Ibrahimovic was delayed slightly as Hart took a sip from his water bottle, but the keeper denied this was gamesmanship.
He said: "I am stupid but I am not crazy! I just needed a drink. I am pretty sure he is one player who you are not going to make change his mind or do anything that he doesn't want to do."
Meanwhile, Vincent Kompany is in contention to make a surprise return from injury in time to play in the second-leg.
The City captain has been out of action with a calf problem since the round of 16 second-leg against Dynamo Kiev three weeks ago.
Despite initial fears that he could miss the rest of the season, Kompany has returned to training and City manager Manuel Pellegrini admits that the defender could play against PSG.
"The last few days he's worked very well. Now we must test him with more intensity and its very difficult to tell now," said Pellegrini.