The signing of Petr Cech will save Arsenal 12 or 15 points a season, according to Chelsea captain John Terry.
Cech lost his position as Chelsea's first-choice goalkeeper to Thibaut Courtois last season and has since been given permission to seek a move elsewhere.
Arsenal have been heavily linked with a move for the Czech Republic international as Arsene Wenger seeks to find a solution at what has long been a troublesome position for Chelsea's London rivals.
And Terry told talkSPORT: "There's talk of Arsenal signing Petr Cech and, if they do get him, he will strengthen them for sure. He will save them 12 or 15 points a season.
"Petr was an unbelievable professional last year. When you get left out of the team it can be hard to accept but, when he came in [to the side], he was exceptional.
"He deserves a lot of credit for that. We understand he wants to play first-team football but nobody wants to see him leave the club.
"He's going to be sorely missed and will improve any side he goes to."
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