And should the keeper fail to secure a permanent move away to another club that meets his demands then he will rejoin Chelsea for pre-season training in July.
Strasbourg have expressed an interest in signing the Serbian permanently this summer.
However, there is also interest from various Premier League sides – West Ham being one of them – as well as teams from Europe.
Chelsea were planning to include Petrovic in their Club World Cup squad had he not asked to be left out regardless of their recent bid to land AC Milan star Mike Maignan.
The West Londoners could revisit their attempt to sign the France international when the summer transfer window reopens on June 16.
However, Maresca still has faith in his other goalkeepers Robert Sanchez, Filip Jorgensen and Mike Penders, which is also a reason why Petrovic couldn’t be guaranteed a starting role.
Andrey Santos, who also played for Strasbourg last season, is the only loanee to be included in the Club World Cup squad.
The same doesn’t apply for Raheem Sterling, Joao Felix and Axel Disasi, while new signings Liam Delap, Dario Essugo and Mamadou Sarr will be flying to the US.
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Club World Cup 2025 Guide
SOME of the world’s biggest clubs are heading Stateside for a MAMMOTH Club World Cup.
Chelsea, Paris Saint-Germain, Real Madrid, Man City, and Inter Miami are among the 32 teams taking part in the tournament, which runs from June 14 to July 13.
Lionel Messi, Kylian Mbappe, Erling Haaland, Ousmane Dembele, Cole Palmer and Harry Kane will be showing their skills to packed crowds across the US.
Los Blancos are favourites to lift the trophy in New York but will face stiff competition from around the globe.