Chelsea boss Antonio Conte says Diego Costa's goal was the reason why he decided not to make any substitutions before the 84th minute of the game.
The Blues suffered their first Premier League defeat of the season as they failed to go top of the league.
They face Leicester City in the League Cup on Tuesday before facing Arsenal at the Emirates on Saturday 24.
"In the second half we started with the same players and you saw another game, with great intensity," he said.
"We scored the goal and created chances so for this reason I waited to make the substitutions. In the last 10 minutes I changed three players to try to give freshness and change the result.
"In that moment I had to decide whether or not to put two wingers in. I wanted to change a midfielder to put Fabregas on but it could have been Batshuayi and not either Moses or Pedro. I needed to put Hazard closer to Diego.
"I'm guilty because I'm the coach and it means I have to work more.
"We must feel the danger in every single moment of the game if we want to win and think like a great team. We must pay attention and be focused."