Manchester City extended their lead at the top of the Premier League to 13 points with a 1-0 victory over Chelsea thanks to a Kevin De Bruyne goal.
The Belgian curled home the only goal from outside the box in the final 20 minutes to secure a 12th straight league win for the champions.
After defeating Pep Guardiola’s team in last season’s Champions League final, Chelsea’s only goal for the rest of the season appears to be securing a place in Europe’s top club competition next year.
The Blues are currently second in the league, but they have only won one of their last six league games.
Thomas Tuchel has won four of the five meetings between the teams by a lone goal since taking over as Chelsea manager.
Chelsea’s second-choice goalkeeper Kepa Arrizabalaga and Malang Sarr, making their Premier League debuts, stymied Manchester City’s attack.
Prior to the break, City had only one real chance to score, and it came as the result of a Chelsea error.
Mateo Kovacic’s pass deflected off De Bruyne into the path of Jack Grealish, but the most expensive English player of all-time missed the chance to mark his biggest moment yet as a City player as his shot was turned behind by Arrizabalaga.
As with Grealish, Romelu Lukaku’s arrival at Stamford Bridge has had a similarly underwhelming impact.
This was the Belgian’s fourth consecutive start since he was benched against Liverpool earlier in the month for speaking to Italian media about his dissatisfaction at Stamford Bridge.
Chelsea’s title hopes have dwindled since wingers Ben Chilwell and Reece James went out for the season with long-term injuries.
Raheem Sterling gave Marcos Alonso a rough ride, but the England international lacked the finishing touch as he fired a shot just wide after jinking past the Spaniard.
An underwhelming atmosphere pervaded the Etihad Stadium throughout a thrilling title showdown between top-of-the-table rivals.
Although the game’s outstanding moment brought the crowd to their feet, De Bruyne delivered what could be the decisive blow to their title hopes.
His shot found its way into the bottom left-hand corner of the net after he fought off N’Golo Kante’s challenge.
In their pursuit of City’s shadows, Chelsea were unable to respond and could have been defeated by a larger margin.
A Phil Foden header from a Sterling cut-back went wide, but it was enough for the Reds to secure their fourth league crown in five years with just one goal.