Cesar Azpilicueta says Chelsea must finish off teams when they are on top of the game.
The Blues dominated Leicester for the first half an hour of their contest at Stamford Bridge on Sunday, with Mason Mount putting the hosts ahead after seven minutes.
But Frank Lampard's side couldn't find a second and Leicester eventually equalised in the second-half through Wilfried Ndidi.
"When you have better spells than the opponent you have to kill the game,' the skipper said.
"In the first 20, 25 minutes we were a lot better than them, we were controlling the game and having a lot of chances. We needed to score a second goal.
"The Premier League is very tough, and Leicester are a good team with good players and good quality. We knew they could create us problems and when you are 1-0 up you are risk."
