English goalkeeping legend Peter Shilton has warned Arsenal about expecting miracles from new signing Petr Cech this season, adding that he feels the 33-year-old stopper could be vulnerable without a solid defence ahead of him, despite being one of the top 'keepers in the Premier League.

The Czech Republic international was signed from Chelsea earlier this month, in what was a big coup for the Gunners, who are the Blues' direct rivals for the Premier League title.

Jose Mourinho was initially reluctant to let the keeper leave, but has since supported the club's stance on allowing him to join the north London club following 11 successful years at Stamford Bridge.

Cech's arrival at the Emirates Stadium has been hailed by former players as a game changer, and with his arrival, the expectation levels have increased regarding Arsenal's chances of challenging the Premier League champions for the title next season.

However, the former Three Lions stopper, who made 125 appearances for England, has pinpointed that Cech did struggle at times when the Blues were not particularly playing well and believes that one factor in his good performances was the quality of defenders playing ahead of him at Chelsea.

"He is not getting any younger. I have always rated him, he is a top quality good goalkeeper, but I've just thought on a few occasions that when Chelsea struggled, he struggled a bit sometimes," Shilton said, speaking on Alan Brazil's breakfast show on talkSPORT

"He was playing behind a really good defence at Chelsea and that gives you confidence week in, week out but if he doesn't get that cover we will see if he has that top quality and that confidence to perform," the former Leicester City and Nottingham Forest goalkeeper added.