I don't think it's true. She has a boyfriend or had a boyfriend for some time from what I've heard. I personally can't see them anymore than friends and I also don't want to.
The rumors started like Z said when she went to see some of his matches early last year. They both also went to see Igor Kuni's match at that tournament but were not sitting together or seen talking. There hasn't been any real proof of them being cozy together so I think it's just people trying to make something out of it.