On 3 December, Chelsea handed Manchester City their first home defeat after the Blues came back from a Gary Cahill own goal in the first half with three second half goals to earn a 3–1 victory.
The match ended in a wide-scale brawl that occurred as a result of a Sergio Agüero two legged lunge tackle on Chelsea defender David Luiz.
Following the brawl, Aguero and Fernandinho were both sent off with straight red cards, Fernandinho being sent off due to his violent conduct against Chelsea midfielder Cesc Fàbregas.
Aguero received a four-match ban for his actions, while Fernandinho received a three-match ban.
Following the game, the FA charged both clubs involved with failing to control their player's on-pitch behaviour, with both clubs having until 8 December 2016 to respond to the charges.

On 9 December, Chelsea became the first club to collect three Premier League awards in the same month, picking up all the prizes for November: Diego Costa was named Player of the Month after registering two goals and two assists in three November contests; Antonio Conte was named Manager of the Month for the second successive month after guiding the club a perfect three wins out of three matches; and Pedro won Premier League Goal of the Month for November thanks to his curling effort from outside the box in the match against Spurs on 26 November.

On 11 December, Chelsea prevailed over West Bromwich Albion with a close 1–0 win, the only goal of the game coming in the 76th minute from Diego Costa, the Spaniard scoring his 12th goal of the season.
The win sent Chelsea top of the table again, three points clear of second-placed Arsenal, and gave Chelsea their ninth consecutive league victory.

On 13 December, manager Antonio Conte confirmed that 20-year-old Brazilian winger Kenedy had returned to Chelsea from his loan spell at Watford after struggling with injuries and being unable to hold down a first team place while on loan.
Kenedy had made just one substitute appearance for Watford during his loan spell, coming on in the 75th minute of Watford's 2–0 away defeat to Burnley.

On 14 December, Chelsea secured their tenth consecutive league victory with a 1–0 away win over Sunderland.
Cesc Fàbregas scored his first league goal of the season in the 40th minute after an assist from Willian.
Eden Hazard missed his first league game of the season after picking up a knock during the win over West Brom.
César Azpilicueta made his 200th appearance for the Blues in the match, just one day after signing a three-and-a-half-year contract that will keep him at the club through the 2020 season.

On 17 December, Gary Cahill made his 300th appearance for the club as Chelsea narrowly won over Crystal Palace 1–0, away at Selhurst Park, extending Chelsea's unbeaten streak at Selhurst Park to 26 years, since Palace last defeated Chelsea there in 1990.
The win takes Chelsea nine points clear of title chasers Liverpool and Arsenal, both having a game in hand over Chelsea.
The win also meant that Chelsea are the third team in Premier League history to reach 500 league wins, after Arsenal and Manchester United.
Chelsea also equal a club record with 11-straight league wins; Chelsea last achieved this feat from April to September 2009.
Diego Costa and N'Golo Kanté both accumulated their fifth yellow cards of the season, resulting in themselves not being available for selection in the Boxing Day match against AFC Bournemouth.
Diego Costa scored his 13th league goal of the season and his 50th for Chelsea since first signing.
Diego Costa's 50th goal in 97 games for Chelsea meant that he eclipsed Didier Drogba's record of 50 goals in 112 games.

On 22 December, young Chelsea midfielder Charly Musonda made an early return from his loan spell at Real Betis after struggling for fitness and form while on loan.
Musonda only made one start throughout his loan spell, having apparently fallen out with former Betis manager Gus Poyet.

On 23 December, Chelsea announced the permanent transfer of Oscar to Shanghai SIPG for a club record £52,000,000, to be completed within the January tra
On 3 December, Chelsea handed Manchester City their first home defeat after the Blues came back from a Gary Cahill own goal in the first half with three second half goals to earn a 3–1 victory. The match ended in a wide-scale brawl that occurred as a result of a Sergio Agüero two legged lunge tackle on Chelsea defender David Luiz. Following the brawl, Aguero and Fernandinho were both sent off with straight red cards, Fernandinho being sent off due to his violent conduct against Chelsea midfielder Cesc Fàbregas. Aguero received a four-match ban for his actions, while Fernandinho received a three-match ban. Following the game, the FA charged both clubs involved with failing to control their player's on-pitch behaviour, with both clubs having until 8 December 2016 to respond to the charges.
On 9 December, Chelsea became the first club to collect three Premier League awards in the same month, picking up all the prizes for November: Diego Costa was named Player of the Month after registering two goals and two assists in three November contests; Antonio Conte was named Manager of the Month for the second successive month after guiding the club a perfect three wins out of three matches; and Pedro won Premier League Goal of the Month for November thanks to his curling effort from outside the box in the match against Spurs on 26 November.
On 11 December, Chelsea prevailed over West Bromwich Albion with a close 1–0 win, the only goal of the game coming in the 76th minute from Diego Costa, the Spaniard scoring his 12th goal of the season. The win sent Chelsea top of the table again, three points clear of second-placed Arsenal, and gave Chelsea their ninth consecutive league victory.
On 13 December, manager Antonio Conte confirmed that 20-year-old Brazilian winger Kenedy had returned to Chelsea from his loan spell at Watford after struggling with injuries and being unable to hold down a first team place while on loan. Kenedy had made just one substitute appearance for Watford during his loan spell, coming on in the 75th minute of Watford's 2–0 away defeat to Burnley.
On 14 December, Chelsea secured their tenth consecutive league victory with a 1–0 away win over Sunderland. Cesc Fàbregas scored his first league goal of the season in the 40th minute after an assist from Willian. Eden Hazard missed his first league game of the season after picking up a knock during the win over West Brom. César Azpilicueta made his 200th appearance for the Blues in the match, just one day after signing a three-and-a-half-year contract that will keep him at the club through the 2020 season.
On 17 December, Gary Cahill made his 300th appearance for the club as Chelsea narrowly won over Crystal Palace 1–0, away at Selhurst Park, extending Chelsea's unbeaten streak at Selhurst Park to 26 years, since Palace last defeated Chelsea there in 1990. The win takes Chelsea nine points clear of title chasers Liverpool and Arsenal, both having a game in hand over Chelsea. The win also meant that Chelsea are the third team in Premier League history to reach 500 league wins, after Arsenal and Manchester United. Chelsea also equal a club record with 11-straight league wins; Chelsea last achieved this feat from April to September 2009. Diego Costa and N'Golo Kanté both accumulated their fifth yellow cards of the season, resulting in themselves not being available for selection in the Boxing Day match against AFC Bournemouth. Diego Costa scored his 13th league goal of the season and his 50th for Chelsea since first signing. Diego Costa's 50th goal in 97 games for Chelsea meant that he eclipsed Didier Drogba's record of 50 goals in 112 games.
On 22 December, young Chelsea midfielder Charly Musonda made an early return from his loan spell at Real Betis after struggling for fitness and form while on loan. Musonda only made one start throughout his loan spell, having apparently fallen out with former Betis manager Gus Poyet.
On 23 December, Chelsea announced the permanent transfer of Oscar to Shanghai SIPG for a club record £52,000,000, to be completed within the January tra
2016–17 Chelsea F.C. season