Chelsea will renew hostilities with European champions Barcelona in the Champions League after being pitted together in Group A of this season's competition.

The Barclays Premiership champions have met Barca in each of the last two seasons, winning the first tie and losing the second and on both occasions the matches were tainted with controversy.

Jose Mourinho's side will also face Werder Bremen and Levski Sofia, while Manchester United and Celtic were drawn together in Group F.