Diego Costa expected out at least two weeks

Diego Costa's hamstring was supposed to medically ok.  The scans were clear.

Jose on Diego Costa: 'We did every test, every scan, he trained two days with the team... he was ready to play and help the team.' #CFC

— Chelsea FC (@ChelseaFC) April 4, 2015

According to Mourinho's pre-match words, the reason Costa wasn't starting was more a confidence, mentality issue.  So when Chelsea's leading goalscorer was subbed on at half-time for Oscar with the Blues in search of a winning goal, we didn't have any reason to be too concerned.  Ten minutes later, Costa's day was over.  He was clutching at his left hamstring as he limped off the field to be replaced by time-wasting strongman Didier Drogba.

Jose: 'Diego has to go home, it is too early. He will be out a couple of weeks, but we have seven weeks to the end of the season.' #CFC

— Chelsea FC (@ChelseaFC) April 4, 2015

At least two weeks would mean missing QPR (away) and Manchester United (home).  Arsenal (away) is the week after that.

Jose: 'We have three strikers. Diego won the right to be first choice but Didier and Remy are there and work for us.' #CFC

— Chelsea FC (@ChelseaFC) April 4, 2015

Fortunately Rémy has a knack for goals.  So we're probably fine.  And hopefully Costa recovers quickly and, most importantly, fully.

Mourinho says medical scans, doctors and Costa himself felt player was ready to play. "As a manager I have to risk things."

— Miguel Delaney (@MiguelDelaney) April 4, 2015

Mourinho: "Medical departments, they have to do same [take risks] if they want to be top medical departments."

— Miguel Delaney (@MiguelDelaney) April 4, 2015

Mourinho: "The safe medical department cannot work with me. Safe people, people afraid to take risks, cannot work with me."

— Miguel Delaney (@MiguelDelaney) April 4, 2015