Former Chelsea midfielder Andre Schurrle says goalkeeper Petr Cech is a good signing for Arsenal but not enough to challenge Chelsea for the title.
The Czech Republic international left Stamford Bridge after 11 years to become Arsenal's first summer signing.
But Schurrle believes the 33-year-old is not enough for the Gunners as he believes Chelsea will again be strong favourites to win the Premier League.
"For sure it is a great transfer for Arsenal," Schurrle is quoted as saying by the London Evening Standard.
"Petr Cech is a great professional and person so he will help them a lot this season.
"I think the league will be the same because they are champions now and know how to win and the whole team stayed, so they will be very good.
"I think they are favourites for the title."