Cahill is urging hus teammates not to panic after their surprising 2-1 loss to Crystal Palace.
The match started in fine fashion for Chelsea, with Fabregas opening the scoring after just five minutes, but Zaha and Benteke scored in quick succession to end the match.
Tottenham closed the gap between them and Chelsea to seven points, after winning 2-0 against Burnley.
“We are disappointed as we had a chance to chalk another three points off,” Cahill told Match of the Day.
“We have to regroup. It is a little setback but we need to focus on Wednesday. We need to keep calm and go again. The gap is still there. It puts emphasis on Wednesday. It adds a bit more pressure but the boys respond to that.
“They made it difficult. It was a crazy 15 minutes [but] once we settled it was one-way traffic.
“I hate possession stats. It is about putting the ball in the net.”