Cesc Fabregas said Chelsea's confidence was returning after they swept aside a barely recognisable Manchester City team 5-1 in the FA Cup.
Chelsea scored four times in the second half as they crushed a youthful visiting side featuring five full debutants in the fifth-round tie at Stamford Bridge.
"You can see straight away we are playing better and better and the confidence once you start winning is growing and growing," Fabregas said on BBC One. "We still have to improve. We have big games coming up."
The midfielder claimed City's decision to make wholesale changes did not play into the Blues' hands, though.
"For us it was negative," he said. "It puts pressure on us. The pressure was on us, big time."
His team-mate Eden Hazard was impressed by Guus Hiddink's side's second-half showing.
"We did very well second half. The target is to win this FA Cup. We did very well and we deserved to win," the Belgium international said.