Chelsea manager Jose Mourinho reckons they should have taken advantage of the space Liverpool had in the 1-1 semi-final first -leg at Anfield on Tuesday night.
After taking the lead in the first half through Eden Hazard's goal from the penalty spot, Liverpool dominated most of the game. Thibaut Courtois was in immense form on the night and saved Chelsea from conceding more goals.
But Mourinho feels his side also had opportunities to finish off the Reds after saying Liverpool offered them spaces which they should have capitalised on.
"We played to the top of our potential and so did Liverpool, it was a proper semi-final," Mourinho told Sky Sports.
"I think it was a fair result. Liverpool did not deserve to win this game, but we were in control.
"The way they played, with three defenders, we had a lot of space to counter-attack, but we were not very efficient in our passing.
"We had plenty of half-chances with the space we had, but with more quality we would have scored more goals.
"We had lots of situations where we recovered the ball and were facing a three defenders tactical system with lots of space to counter-attack," the Blues manager added.
"Eden (Hazard), Willian and Diego (Costa) were in great positions but we missed so many passes.
"Exactly the opposite that happened against Swansea. Against Swansea, recover the ball, the right pass and choice and counter-attack.
"It was fantastic defensive work, recover the ball against a very good team with creative players, fast players, but we were not efficient in the transition. To score only one goal frustrates me.
"But to transform the two-leg semi-final into a one-leg semi-final with that leg at Stamford Bridge is obviously better for us."