Ivory Coast legend Drogba made his first appearance for Chelsea since scoring the penalty that won the 2012 Champions League in Munich when he came on as a second-half substitute for summer signing Diego Costa.

However, Jose Mourinho's side were already 2-0 down at that point and Drogba's return ended in a tame defeat at the Weserstadion.

Blues captain John Terry conceded a soft penalty after 20 minutes when he needlessly blocked the ball with his arm and Dutch winger Eljero Elia stepped up to plant his spot-kick past Belgian 'keeper Courtois, who has joined up with Chelsea after a long-term loan at Atletico Madrid.

It got worse for the visitors 17 minutes later when Terry was again implicated as Polish winger Ludovic Obraniak darted past the static centre-half to glance a header past Courtois.

Mourinho made several changes at the break, including the introductions of Drogba and Branislav Ivanovic, while Eden Hazard entered the fray in the second half.

Bremen won a second penalty in the last minute when Dutch defender Nathan Ake was punished for what appeared to be a fair challenge but it didn't matter to Felix Kroos, who stroked the ball past substitute 'keeper Petr Cech from 12 yards.

Chelsea, who had previously registered four wins and a draw in pre-season, continue their preparations with a game against Hungarian side Ferencvaros in Budapest next Sunday.

Their opening Premier League game will be away to promoted Burnley on Monday, August 18.