The sacking of Portuguese manager Jose Mourinho and his staff in 2015 after poor performance cost Chelsea £8.3m in compensation, figures released by the Premier League club show.
Mourinho, now in charge of Manchester United, was sacked in December 2015 after a poor start to the Blues’ Premier League title defence.
Gus Hiddink was later appointed the interim manager with the club eventually finishing 10th, and the financial report for the 2015-16 campaign shows a £70.6m loss.
That includes £67m paid to Adidas to terminate a sponsorship deal early.
The club did that to enter into a more lucrative 15-year deal with Nike, worth an extra £30m a year.
The Adidas contract, which Chelsea ended six years into a 10-year agreement, was worth £30m annually.