Eden Hazard says Manchester City and Liverpool are the main threats to Chelsea's Premier League title chances.
Saturday's win against Tottenham means Chelsea will go to the Etihad next weekend top of the table, a point clear of Liverpool and City.
Arsenal, who beat Antonio Conte's side 3-0 earlier in the season, are two points further back, but asked to identify Chelsea's rivals for the title Hazard said: "Man City and Liverpool.
"They are both good. If we want to be there at the end, then we have to finish above them."
Chelsea have won seven straight league games since that defeat at the Emirates in September, and Hazard reckons last season's failure to qualify for Europe is helping.
"It's good," he said. "We have one week to prepare for the game and at the end of the week we know what to do when we play.
"Last year, we were just doing recovery so we weren't always ready for the game, but that's not the case now. We're concentrating on the opposition during the week and give everything.
"We do lots of tactical work and video work, it depends who we're playing. We do everything to be prepared."
Chelsea will be well prepared for the threat of their former player Kevin De Bruyne, who cost City £55m in 2015 - 18 months after he was deemed surplus to requirements at Stamford Bridge.
"He's a top player," said Hazard, De Bruyne's Belgium team-mate. "He didn't get his chance here at Chelsea, but did very well in Germany and since he went to City he's been on fire.
"Sometimes you don't get the chance to play, or the system the manager uses isn't right for you, but now he's full of confidence. I hope next week he'll have less confidence!
"It's good for Belgium that two players are fighting for the title in England, but I hope when we go to the national team we don't fight! We're good friends."