The real winner of the Serena Williams, Maria Sharapova rivalry is Grigor Dimitrov.

Dimitrov has been linked to both lovely tennis ladies in the past, but now he's hitched his heart to former Pussycat Dolls band member Nicole Scherzinger. The singer, who split from Formula 1 driver Lewis Hamilton in February, is involved in a "secret" relationship with Dimitrov, according to The Sun.

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Dimitrov was in a two-year relationship with Sharapova, but the couple broke up in July. The Bulgarian tennis star appears to be quick at recovering, as he started his courtship with Scherzinger shortly after.

Due to their other highly-publicized relationships, Dimitrov and Scherzinger are looking to keep their relationship private, but it's already reached the tabloids.

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'They're completed besotted with each other," a source said via The Daily Mail. "But they've been careful not to be pictured together because they don't want the pressure of the relationship being in the public eye."

While Scherzinger is moving onto new things, it's said that Hamilton is "upset" by her new relationship after having a seven-year on-again off-again courtship with Sharapova, according to The Daily Mail. The Formula 1 driver also realized he isn't completely over the "Don't Hold Your Breath" singer.

Dimitrov, meanwhile, was involved in somewhat of a love triangle with Williams and Sharapova, who have been rivals on the court for 11 years. Dimitrov ended up dating Sharapova shortly after his relationship with Williams came to an end.

Williams was the subject of dating rumors with rapper Drake, but the pair appears to be through as a couple. If Williams was looking to rebound with Dimitrov, he's now off the market.

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