LONDON (Reuters) - Striker Diego Costa, who has scored seven goals for Chelsea in his first four Premier League games, cannot play more than once a week because of a hamstring problem, Chelsea manager Jose Mourinho has said.
Mourinho, looking down in the dumps after Chelsea could only draw 1-1 with Schalke 04 in their opening Champions League Group G match on Wednesday, started with returning veteran striker Didier Drogba in attack with Costa on the bench against the Germans.
