The Blues signed off with a disappointing 3-0 defeat to Newcastle United, leaving them in fifth place in the table, but the defender has called on his colleagues to bounce back by defeating Manchester United in the FA Cup final.
"It's time to self-reflect. Prior to Huddersfield we were in great form. We have to try and brush it under the carpet," Cahill told Chelsea's official website.
"That's not an excuse, any other time I wouldn't be saying that, but we have a massive week now to prepare for a cup final which is very important for us."
The FA Cup final takes place at Wembley Stadium on May 19.