Last season 's Champions League finalists Barcelona qualify for first round in 2012 - 13 . Spanish club could have qualified for last 16 but went down 2 - 1 away to Celtic . Champions Chelsea snatch injury - time win at home to Shakhtar FC . Manchester United through to group stage after fourth successive win .
Last season 's Champions League finalists Barcelona lose for first time in 2012-13 . Spanish side could have qualified for last 16 but went down 2-1 away to Celtic . Champions Chelsea snatch injury-time win at home to Shakhtar Donetsk . Manchester United through to knockout stage after fourth successive victory .