"Drogba is a big player for Chelsea. They'll get by against smaller teams, but I'm sure the bigger teams will be glad he's away," said Keane after their defeat in London.
"Every club misses important players. Good teams will react in a positive way and that's when you use the squad.
"The bigger clubs have bigger squads and they can deal with that. But there's no getting away from the fact that Drogba is a big player for Chelsea."