article_snippet.sent: Mourinho insists United injury crisis does not weaken their team as their head to Chelsea for tomorrow's title clash.
article_snippet.sent: Mourinho believes United will not be weakened by injury problems when United play Chelsea .
article_snippet.sent: Injuries are part of the game.'
article_snippet.sent: 19-goal frontman Diego Costa injured 19-goal frontman Diego Costa hamstring in the win over Stoke City at Stamford Bridge on April 4 .