Cech earlier this week said his future is entirely in the club's hands after he was displaced as first-choice goalkeeper by Courtois following 10 years as the Blues number one.
Belgium goalkeeper Courtois told Sky Sports: "As a goalkeeper you want to play
If I was in that situation and I didn't play a lot, then I would leave too.
"I think Petr is still a goalkeeper with a lot of quality and one of the best there is."
Cech has been linked with a number of the world's leading clubs, including Paris St Germain and Real Madrid, but still has 18 months to run on his current four-year deal.
The 32-year-old has made four starts for the Blues this season, two in the Champions League, as manager Jose Mourinho bids to persuade him to stay and apply pressure on Courtois for the number one position.
Despite leading the Premier League and being eight points clear of defending champions Manchester City, Mourinho is continuing to fine tune his squad.
Andre Schurrle this week played down reports he is set to exit after a disappointing start to the season following his summer World Cup win with Germany.
Egypt forward Mohamed Salah is another who has struggled to make an impact this term and has been linked with moves elsewhere.
Source : PA