Chelsea suffered a further blow after their Champions League defeat by Shakhtar Donetsk as Frank Lampard will be out for at least two weeks with a calf injury picked up in the match. Lampard, 34, was taken off midway through the first half as the European champions lost 2-1 in Ukraine and Chelsea manager Roberto Di Matteo on Friday confirmed Lampard would be out for at least a couple of weeks. That means he will miss the back-to-back games against Manchester United, starting with Sunday\'s Barclays Premier League clash at Stamford Bridge.