Chelsea cannot afford to lose to Arsenal this weekend, admits Didier Drogba.

Drogba has underlined the importance of Sunday's clash, insisting it is crucial defending champions Chelsea do not relinquish another three points.

"I don't think we can afford to lose a second game, especially against Arsenal," he said, reflecting on last weekend's defeat at Manchester City.

"People have to know, and we know, that we're going to lose some games this season.

"But again, it's always good to win, it's always better to win."