John Terry is crediting Guus Hiddink with transforming the Blues' season and guiding them to the FA Cup final.
Chelsea beat Arsenal in the competition for the first time in 62 years in Saturday's first semi-final at Wembley and are have guaranteed a showpiece send-off for the boss on May 30 - if indeed it is to be the Dutchman's last game at the helm.
The 2-1 win owed much to another inspired outing from Frank Lampard, who set up both goals, and some nervy keeping from Lukasz Fabianski in thje Arsenal goal, who was at fault for both goals. But Terry knows who is the real architect of victory.
"He's definitely been a breath of fresh air," Terry said of Hiddink.
"Since the new manager's come in, we've really turned our form around, our spirit, our work-rate for each other and our performances and we'll keep going right to the end.
"We're now in the FA Cup final, through to the Champions League semi-final and right in the thick of things now.
"He knows how to get the best out of the lads.We're resting more between games but he's not letting anyone get away with anything in training.
"He wants everyone to fight for each other and I think that's been the key because in games we're fighting for each other right to the death and it's great to see."
The Chelsea skipper added: "I'd love to get my hands on the trophy again and I'm delighted today. Going a goal down, we showed a great reaction again to come back and win it late on.