According to this article in USA Today Wozniacki vehemently denied the rumors (though I should point out McIlroy has yet to).
"I'm so tired of the rumors. 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. It is so annoying that the media and the so-called sources constantly spread the rumors. They write just what they want.
"[...] All is well [with the relationship], and then there's not much more to say about it. I just want to be allowed to live my life off the court without all the speculation."
That makes two of us who are tired of the rumors.
Somebody get back to me when Rory is dating one of Tiger Woods' exes and a fire-breathing Wozniacki is acing ladies at the Australian Open as payback.
Until then, I'm moving on (and not trusting the Irish Independent ever again).