Tottenham Hotspur manager Mauricio Pochettino says defensive mistakes cost his side the game in the first half.
Spurs created early chances against Chelsea as they put the pressure on the Premier League leaders but were caught napping when Eden Hazard and Didier Drogba gave the hosts an early lead.
"We're very disappointed because we created some chances to score," Pochettino said.
"[We then] conceded in Chelsea's first action, the game changed. After two or three minutes we made a mistake and they scored again."
Despite the defeat, the Argentinean was full of praise for his players for their reaction in the second half.
"But I want to congratulate my players because they were brave in the second half," Pochettino said.
"Today you could see that we have a very young squad who need games.
"It's not because of that we lost. Chelsea were just very clinical in front of goal."
