Lampard scored four times in the 7-1 win over Aston Villa on Saturday.
Lampard told reporters: “We know the quality of the players we have, we’ve shown that over the course of the season.
“We’ve beaten Manchester United, Liverpool and Arsenal playing different formations.
“Now we have to focus on what we have to do – we look forward to going to Old Trafford.”
He added: “We’ve had a few poor performances recently and we have to apologise to the fans for that.
“But hopefully this makes up for those and now we can concentrate on what we know we have to do because if we win all our remaining matches, we will be champions.
“We have to forget the little rut we have had and concentrate on the target.
“It’s up there with our best performances. There was a 6-0 against Manchester City and then a 2-0 against Villa last season, when it could have been six or seven.
“This is right up there because we were playing a very good team. They’ve got good players throughout their team so when you do that to them, well, you can’t say enough about the performance.”
