The Irish Independent's Niamh Horan is anonymously quoting friends of Rory McIlroy who say his long-term and highly public relationship with Caroline Wozniacki is over.
The "friends" say the final straw may have been a September 16th Tweeted photo of Rory having a wee nap.
Friends say a photograph posted by Caroline on Twitter, which showed her boyfriend in a deep sleep, was one of the final straws for the number-one golfer.
One source said: "Rory was very upset by it and even Serena Williams pointed out – albeit in a joking way – it was a pretty mean thing to do."
The relationship ended days after the picture had been posted to millions of fans online. But friends say Caroline is still struggling to accept that the pair have split up.
“I’m so tired of the rumors,” Wozniacki said to Ekstra Bladet in Denmark. “They occur every time Rory and I are apart a few days or do not write on Twitter. There is nothing in it, and from now on I just think that I will keep my private life private.