It had been reported that the world number six and former world tennis number one had split.
But the Danish star was photographed happily following McIlroy around the Jumeirah Golf Estates in Dubai.
Neither has ever confirmed their much rumoured split and both have consistently refused to comment.
However, Wozniacki gave a hint yesterday that she was reunited with McIlroy when she shared a photograph of the golfer in action on the tennis courts.
She still uses a photograph of her and McIlroy together as her Twitter profile picture.
Once touted as a potential golfing legend, 24-year-old McIlroy's struggles on and off the course this past year have been well documented.
He is currently 46th in the Race to Dubai entering the season finale in the Emirate, an event he won thanks to five birdies in the last five holes 12 months ago.