Mendy was signed in a £22 million deal from Rennes in the summer transfer window and has instantly secured the role of first-choice goalkeeper ahead of Kepa Arrizabalaga.
Following Chelsea’s 3-0 win over Burnley on Saturday, Mendy became Chelsea’s first goalkeeper since Cech in 2004 to begin his Premier League career with three clean sheets.
The Senegal international has now kept five clean sheets in a row in all competitions.
And Cech, who played a pivotal role in recommending Mendy’s signing to Chelsea’s hierarchy this summer, believes his side’s new goalkeeper will continue to improve.
‘We had to make sure it was someone everyone agreed on, not just me,’ Cech told Telefoot.
‘It had to be the club, and especially the manager, who had to be comfortable with the choice. We had a list of goalkeepers.
‘We presented it all to Frank Lampard. We spoke with the scouts, we shared information. We gave the pros and cons of each goalkeeper.
‘In the end, my knowledge of Edouard over the last three years helped.
‘I’m convinced he’ll improve more, and these aren’t the best performances you’ll see from Edouard Mendy.’