The Serbian joined the Blues from New England Revolution last year and he had a good debut season with plenty of stand-out displays.

However, he fell out-of-favour under manager Enzo Maresca and he was subsequently loaned out to Strasbourg before the deadline.

Petrovic has been brilliant in goal for the Ligue 1 outfit and he has not given up on becoming the number one for the Blues in future.

He said: "I am just thinking about Strasbourg and the next game. That is a goal to be number one at Chelsea , one of the best teams in the world."

Chelsea currently have Robert Sanchez as their first-choice keeper, but the Spaniard has been prone to making high-profile errors.

The club signed Filip Jorgensen as his deputy this summer and he could be a strong candidate to replace Sanchez in goal pretty soon.

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