The Blues have won their last 11 games to lead the pack at Christmas.
Antonio Conte’s decision to switch to a 3-4-3 formation has been highlighted as a major factor behind their excellent form.
But Cahill reckons the players deserve plenty of credit for adapting to the new system and improving on last year’s dismal efforts.
“The manager knows his formation inside out and we have worked very hard on the training pitch to adapt to that formation”
“It’s fantastic,” the Chelsea defender said.
“The mood in the camp at the minute, everyone’s spirits are high. Everyone will tell you that playing in a winning team is easier. The run that we’re on is brilliant so I hope it continues. We’re full of confidence.
“What’s going right is a number of things. Obviously people will touch on the change in formation, but there’s the way we’ve adapted to that formation and the players we have in the team, ultimately.
“A lot was made of last year and rightly so. We had individuals, the majority, under-performing compared to the levels they usually set.
“This season we are hitting the levels we should be setting. I’d be lying if I said I thought we’d be sitting pretty at the top of the table, but I certainly would have expected to be up there competing.
“We’re in a good place.”
Conte has had plenty of success with his three-at-the-back formation throughout his career and Cahill admits plenty of hard graft on the training pitch has helped the Italian’s vision become a reality.
“The manager knows his formation inside out and we have worked very hard on the training pitch to adapt to that formation,” he told Sky Sports.
“People talk about the formation, but I think it’s the way we’re playing that formation – and that comes a lot from the manager and his experience with this formation and ultimately the lads taking it on board and going out and delivering it.
“It’s a number of things that have given us success, it’s not just all of a sudden, ‘We’ll play this formation, off you go…’
“It doesn’t work like that. You have to put a lot of work in on the training ground.”