Report - 'Mourinho observers' unconvinced over severity of Costa injury claims regular followers of Jose Mourinho aren't entirely convinced over the nature of Diego Costa's injury. claims that observers close to manager Jose Mourinho won’t be convinced that Diego Costa isn’t playing against Manchester United this weekend until he’s not named on the team sheet.

Costa is widely expected to miss the game due to a persistent hamstring problem, but Goal claims the mystery Mourinho produces surrounding the problem makes him difficult to predict for those closer to the Chelsea boss.

“Mourinho has offered routinely pessimistic briefings about Costa's condition all season without actually providing much insight into the state of his hamstring. On Monday he ignored questions about whether his star forward has a strain or, more seriously, a tear,” writes Wayne Veysey.

“While the indications from the Bridge are that Costa will not be involved again on Sunday, regular Mourinho observers will not be convinced of the player's absence until his name is not included on the teamsheet.”

Mourinho has always had a healthy respect towards Manchester United, which relates to his previous, and current, relationship with United legend Sir Alex Ferguson.

In short, he won’t take United lightly despite their dramatic and well publicised fall from the very top of the English game.

However, those holding beliefs that Mourinho could risk Costa against United this weekend are surely set to be disappointed, because it would be an amazing decision by the Portuguese to risk someone who could be so prolific for the Blues during his time at the club.

“Our medical department will take great care of him and in mid-November he will be in perfect condition,” said Mourinho earlier in the week.

Didier Drogba formed his reputation on terrorising defences like United’s current back four and if he recovers well after his performance against Maribor last night then it’s a no brainer for him to start at Old Trafford.

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