Patrick Mouratoglou reveals some details from his split with Serena Williams

Williams, 40, hasn't played since retiring her Wimbledon first round match last year

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nobody knows exactly what the American plans to do next.

In April, Mouratoglou announced he accepted to become the new full-time coach of Simona Halep.

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"I wanted to be fair to her and not be disappointed at the end of my career," Mouratoglou said.

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Mouratoglou thought he was done with coaching when Williams decided to take a break

but a few months later, he started missing coaching. When Halep made an offer, Mouratoglou badly wanted to return to coaching.

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