MANCHESTER – Sir Alex Ferguson believes Didier Drogba’s departure from Chelsea is good news for Manchester United as he has such a great record in big games.Drogba inspired the Blues to Uefa Champions League glory at the end of last season before announcing that he had decided to bring his eight-year spell at Stamford Bridge to an end.He has since secured a transfer to Chinese side Shanghai Shenhua, and Ferguson doubts whether Chelsea will remain as strong a force in the future.Ferguson feels that Drogba was such a key player for Roberto Di Matteo’s side that his summer exit can only be welcomed by the other Premier League title challengers.“When you think of the season he’s just had, I must say it is a big boost for us that Drogba is leaving Chelsea,” Ferguson said in The People.“He scored that fantastic goal in the final with two minutes to go and his goalscoring record in the big games, in big finals, is incredible. “As far as I was concerned, he won the Champions League for Chelsea.”