The searing sunlight wasn't the only thing sparkling on Caroline Wozniacki's court, where the crowds got a glimpse of her very large, brand new diamond engagement ring from golfer Rory McIlroy.

Wozniacki had tweeted a picture of the ring after McIlroy popped the question on New Year's Eve in Sydney. But she provided a few more details on Tuesday after winning her first-round match at the Australian Open, where temperatures for her morning match topped 38 C and got hotter later in the day.

The former No 1-ranked player raced to a 6-0, 6-2 win over Lourdes Dominguez Lino, then sat on her bench, pulled the ring from her tennis bag and slipped it on her finger. An on-court interviewer asked her to hold it up for the crowd and recount the proposal, which she said was very traditional.