Arsenal boss Arsene Wenger believes Michy Batshuayi can be Chelsea's secret weapon this season.
Arsenal meet Chelsea on Sunday in the Community Shield.
Wenger said, "I would say that Chelsea look like they have kept the basis of 95 per cent of their squad. They have added Bakayoko who is a very strong player, strong ball-winner, similar to Matic, maybe less distant runner but more of an impact player - but certainly they will fight for the championship again.
"They have replaced Costa with Morata. Morata is maybe less of a goalscorer than Costa, but he can score and provide as well.
"Against us in Asia, Batshuayi played very well. He is a young striker who is promising as well, so I expect them to fight again for the championship."
Source: tribalfootball.com