[3] On 13 June, Chelsea and Bayer Leverkusen reached an agreement for the transfer of André Schürrle, subject to the completion of legal documentation and related matters, including personal terms and passing a medical.

[11] A number of players were released by the club; Yossi Benayoun, Florent Malouda; who joined Trabzonspor in Turkey; Ross Turnbull, who signed for Doncaster Rovers; and several youth prospects that failed to live up to expectation.

After having two bids rejected for Norwich City goalkeeper John Ruddy, Mourinho decided to sign Mark Schwarzer as back up for Petr Čech.

[14][15] Oriol Romeu left Chelsea to go on loan at Valencia for the entirety of the season, while West Bromwich Albion youngster Isaiah Brown was signed for around £250,000.

Chelsea registered another win in their Round 2 fixture three days later on 4 August, once again a comfortable 2–0 victory, this time over Internazionale's cross-town rivals Milan in New York City.

On 7 August, Chelsea lost their perfect pre-season record after they were defeated in the International Champions Cup final by Real Madrid in Miami, losing 3–1.

This marked the end of a largely successful pre-season for Chelsea, registering wins over Italian top flight opposition in Inter, Milan and Roma, while comfortably defeating three Asian sides.

Promising young full-back Wallace was sent on loan to Inter Milan and newly signed striker Stipe Perica joined NAC Breda.

Despite Frank Lampard's early penalty miss, Oscar gave Chelsea the lead, poking the ball under the onrushing Allan McGregor after a sumptuous passing move.

Villa later equalised through a quickfire shot from Christian Benteke inside Petr Čech's near post, but after 73 minutes, Branislav Ivanović connected with Lampard's free kick to head home the winner.

In their final game before their UEFA Super Cup clash with Bayern Munich, Chelsea were held by Manchester United to a dour 0–0 draw at Old Trafford on 26 August.

Just before Chelsea were drawn in the 2013–14 UEFA Champions League group stage, they announced the signing of Samuel Eto'o from Anzhi in a deal believed to be around £2 million.

The match was a tense encounter largely dominated by Bayern, but Chelsea were dangerous on the break, opening the scoring through a fantastic strike from Fernando Torres, who was set up by André Schürrle, who had received the ball from Eden Hazard following a mazy run.

Chelsea managed to hold on until the final five seconds after spending much of extra-time camped in their own 18-yard box, but Javi Martínez broke their hearts putting the ball past Čech after a deflection carried it into his path.

[26][27] On the final day of the transfer window, Victor Moses and Romelu Lukaku joined Merseyside clubs Liverpool and Everton, respectively, on season-long loans whilst Ulises Dávila was sent to Córdoba in Spain.

After two well-worked goals from Fernando Torres and Ramires, Chelsea comfortably defeated Swindon Town in their League Cup third round tie on 24 September[31] to set up a trip to the Emirates to face local rivals Arsenal.

Cardiff opened the scoring through Jordon Mutch, capitalising on a David Luiz mistake, however Chelsea dominated the game from there on in, with two goals from Eden Hazard and high quality finishes from Samuel Eto'o and Oscar completing the rout.

The match was a tense encounter in which Fernando Torres played superbly, netting a late winner following a defensive mix-up after setting up André Schürrle for Chelsea's first.

In a post-match interview, Mourinho expressed his bewilderment at the result: "I am angry, because I don't understand why after a fantastic run of matches, we lose this game"(BBC MOTD).

Chelsea continued their strong Champions League form by defeating Schalke 04 3–0 at Stamford Bridge on 6 November in their fourth group game with a brace from Samuel Eto'o and an acrobatic volley from Demba Ba, thus making it three consecutive wins without conceding a goal.

[36] Chelsea's next match saw them defeat a spirited Sunderland side 3–4 in a thrilling, topsy-turvy encounter at the Stadium of Light; yet again the Blues went behind but were able to fight back to get the win following a mercurial display by Eden Hazard, who scored a brace.

[38] Chelsea finished in first place in their Champions League group after beating Steaua București at Stamford Bridge through a solitary Demba Ba goal.

Chelsea began their 2014 FA Cup campaign with a comfortable 2–0 win against second-tier side Derby County, managed by former England coach Steve McClaren.

First, Samuel Eto'o capitalised on a mistake from Jan Vertonghen before Younès Kaboul fouled the Cameroonian and was subsequently sent off, conceding a penalty that Eden Hazard converted.

Chelsea began April in poor fashion, as they lost 3–1 to Paris Saint-Germain at the Parc des Princes, leaving their 2013–14 Champions League hopes in the balance.

[62] The second leg of the Champions League quarter-final ended in dramatic fashion, as a last minute goal from Demba Ba sent Chelsea through to the semi-finals at the expense of PSG.

Eden Hazard limped off early and was replaced by André Schürrle, who subsequently scored from a long throw-in after 32 minutes before Demba Ba's late goal secured Mourinho's unbeaten record in the Champions League quarter-final stage.

Demba Ba capitalised on a Steven Gerrard error to give the Blues the lead in first-half stoppage time before Fernando Torres broke away and set up Willian to send Chelsea two points behind Liverpool.

Source: Chelsea FC website Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Source: 2013–14 Premier League Squad Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.