Chelsea head coach Maurizio Sarri and Manchester City boss Pep Guardiola played down the impact of the Blues' 2-0 win over the Premier League champions on the title race.
Goals from N'Golo Kante and David Luiz saw Chelsea inflict City's first loss of the season, ending a 21-match unbeaten run in the league, which saw Guardiola's men relinquish top spot in the table.
Sarri insisted afterwards that Chelsea are still behind City in the pecking order.
The Italian said: "I'm happy for the win because it's difficult to win against Guardiola's team. I know very well they are a step ahead now.
"In a competition of 10 months it's very difficult to cover the gap.
"I think they are at the moment the best team in Europe. We won today, but we have to say we were a bit lucky in the first 25 minutes, because they could score."