Manchester United boss Sir Alex Ferguson has questioned how Chelsea will handle next season without Didier Drogba. In the first swipe of pre-season, the Manchester United boss admits he was stunned to hear the Ivory Coast hitman, 34, had quit ­Stamford Bridge for Chinese outfit Shanghai Shenhua.

Fergie said: "It is a big boost for us that he's leaving. Drogba won the Champions League against Bayern for Chelsea with that header - only he could have done that."