The Serbia international feels Arsenal have secured the services of a potentially game-changing signing - and admits he hopes the Czech Republic international’s performances dip at the Emirates Stadium.
However, Matic wished his former teammate all the best and is pleased the goalkeeper and his family have managed to stay in London.
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“Petr is a great guy and a great keeper. It is going to be a very important signing for them,” Matic was quoted as saying by the Guardian. “But I am not happy because of that. We know that he is very professional. He is one of the best keepers. And I hope this season he does not perform as he did here for 10-11 years.
“I am happy for him because he gets to stay in London, which for him and his family was very important. I wish him all the best.”
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Cech impresses on first Arsenal appearance
Cech made his first appearance for Arsenal on Saturday, in the Gunners’ 3-1 win over Everton in the final of the Barclays Asia Trophy in Singapore.
The 33-year-old pulled off several top saves - including this stunning finger-tip save onto the crossbar - but was beaten by a Ross Barkley thunderbolt in the second half.
Cech, despite being handed the No. 33 shirt, will begin the 2015-16 campaign as Arsenal’s first-choice goalkeeper ahead of both David Ospina and Wojciech Szczesny.
Arsenal have lacked a top-class goalkeeper since the departure of David Seaman in 2003 - Jens Lehmann was a fine keeper in his own right, although his temperament was a problem at times - but Cech is still one of the best players in the world in his position.
Arsenal could win the league with Cech
It was no secret that Jose Mourinho wanted to keep Cech at Stamford Bridge, but the veteran goalkeeper was not prepared to spend a second successive season playing second-fiddle to Thibaut Courtois.
Cech was subsequently granted permission to join London rivals Arsenal by Chelsea’s billionaire owner Roman Abramovich - a thank you for 11 fantastic years of service.
Arsenal boss Arsene Wenger will be hoping that Chelsea captain John Terry was right when he told talkSPORT last month that Cech is worth between 12 and 15 points every season.
Had Arsenal secured an extra 15 points last season, they would have sealed their first Premier League title since 2004.
Chelsea fans: will Arsenal finish above your team next season with Petr Cech? Have your say by leaving a comment in the box below!