In January Chelsea made some changes. The end result was the departures of Juan Mata and Kevin De Bruyne - and the arrivals of Nemanja Matic and Mohamed Salah.
In the case of the latter, once again Chelsea stole him from underneath the nose of a Premier League rival.
In the summer they snatched Willian from the grasp of Tottenham Hotspur - in January it was Liverpool’s.
For much of the winter it looked as if Liverpool were on the verge of snapping up the Egyptian but Chelsea swooped in and signed him up instead.
His first half a season at the club have been predictably quiet. He has settled into life in London well but for the most part has been used as a substitute at the club.
Of course much of the impressing Salah did that made Mourinho splash out on him was against Chelsea in their Champions League ties this season. The Egyptian scored against Chelsea at Stamford Bridge, a game the Swiss side won 2-1 when Marco Streller headed home 11 minutes later.
But that has not stopped Salah proclaiming one of the Chelsea defenders as the best he has faced in a game.
Speaking to Chelsea.com the flying winger suggested that Spaniard Cesar Azpilicueta was the toughest opponent he had faced so far in his burgeoning career.
"[Best opponent] Azpi is a good player and he always fights for the ball. I played against him last year, I have that experience and now I play with him. I also scored against him though when I was playing for Basel!"
Last season was an excellent one for Azpilicueta, playing out of position at left-back he consistently pushed Ashley Cole to the bench and it is clear Mourinho is a big fan of the Spanish international.
Next season Chelsea are expected to bring in a new left-back, which might just allow Azpi the chance to revert back to the right hand side.
But after the season he had, and with glowing references from his team-mates, don't expect the full-back to be anywhere else than in the Chelsea starting line-up next season.