[19] On 13 July, the Blues completed the signing of Bosnian goalkeeper Asmir Begović from Stoke City on a four-year deal for a reported £8 million.

On 28 July, left-back Filipe Luís left the Blues after just one year, moving back to former club Atlético Madrid for a reported £11.1 million.

Oscar gave the Blues the lead before André Ayew drew Swansea level, yet Chelsea went in 2–1 up at the break thanks to a Federico Fernández own goal.

[32][33][34] This match involved an incident in which Eva Carneiro, the Chelsea team doctor, came on to treat Eden Hazard – an action for which she was later criticised by José Mourinho.

Oriol Romeu joined Southampton after four years as a Chelsea player in which he made 33 appearances, scoring once from the penalty spot against Wolverhampton Wanderers in 2012.

[35] Nathan Aké signed a new five-year contract with Chelsea and will continue his development by spending this season on loan in the Premier League at Watford.

Directly after the game, German Bundesliga club FC Augsburg announce that Baba Rahman has signed for Chelsea for a reported fee of £21.7 million.

Thibaut Courtois saved a first half James Morrison penalty before goals from Pedro, Diego Costa and César Azpilicueta sent Chelsea in 3–1 up at the break.

Costa was charged with an act of violent conduct for the incident that started the disturbance, in which he slapped Laurent Koscielny in the face, which was not seen by the match officials but was caught on video.

José Mourinho dropped Eden Hazard, Nemanja Matić and Gary Cahill and chose to start youngsters Ruben Loftus-Cheek and Baba Rahman.

[69] José Mourinho and Nemanja Matić were sent off as Chelsea's miserable Premier League campaign continued with a 2–1 defeat at West Ham on 24 October.

[70] Chelsea crashed out of the League Cup in the fourth round after Jack Butland's penalty shootout heroics earned ten-man Stoke City a 5–4 spot-kick win that increased the pressure on José Mourinho.

Jonathan Walters struck a goal worthy of winning any contest to give Stoke the lead early in the second half, before Loïc Rémy's injury-time equaliser took the tie the distance at the Britannia Stadium.

After nine out of the first nine spot-kicks were clinically despatched—with the likes of Charlie Adam, Marko Arnautović, Oscar, Rémy and Willian successful—Eden Hazard saw his attempt brilliantly saved by Jack Butland, who earned his side a place in the last eight.

A Ramires header gave the Premier League champions the lead after just four minutes, but compatriot Coutinho fired Liverpool level in some style just before half-time.

Oscar came close with a long-range chip, but chances were few and far between in the second half until another Coutinho effort clipped John Terry and flew past Asmir Begović.

Christian Benteke made sure of the points with a composed finish in the closing minutes as Jürgen Klopp secured his first league win since taking charge of Liverpool.

Chelsea eased the pressure on manager José Mourinho as Willian's late winner gave them a crucial Champions League victory over Dynamo Kyiv at Stamford Bridge.

Goals from Gary Cahill, Willian, Oscar and Kurt Zouma sent Chelsea closer to the knockout phase, needing only one point home against Porto.

[76] Tottenham Hotspur extended their unbeaten run in the Premier League to a club record 13 games with a 0–0 draw against Chelsea at White Hart Lane.

The Dutchman was to be at Stamford Bridge for Sunderland's match, but Steve Holland took control of team matters for the game alongside Eddie Newton, who now took on the role of assistant first-team coach.

A first-half goal from Oscar gave the Blues the lead at Selhurst Park, before second-half strikes from Willian and Diego Costa secured all three points.

PSG regained their lead late in the game as Edinson Cavani, who had only entered the match moments prior as a substitute, broke through the Chelsea back line and beat Courtois.

City manager Manuel Pellegrini chose to play a weakened squad that featured five youth players making their senior debuts.

West Ham United opened the scoring with a fantastic long range shot from Manuel Lanzini which sailed past Thibaut Courtois in the 17th minute.

Pedro scored a second after a Pato shot was parried away by Villa goalkeeper Brad Guzan and found its way to the feet of the Spaniard.

After a slow start, Eden Hazard found the net again, continuing an improved run of form with a 32nd minute solo goal to put the Blues in front.

John Swift, who joined Brentford on 1 October, ultimately had his loan extended to the end of the season, while two further players exited on new season-long deals in January.

On 28 April 2015, the schedule for the 2015 International Champions Cup was announced that Chelsea would play New York Red Bulls, Paris Saint-Germain, Barcelona and Fiorentina.

[226] Scoring a total of 13 points, Chelsea advanced to the knockout stage as group winners by winning against Porto, and sending the Portuguese side to the Europa League, in the last round.