Australian Open chief Craig Tiley is confident Rafa Nadal will be at Melbourne Park for next month's Grand Slam despite testing positive for COVID-19, but he is still uncertain whether Novak Djokovic will be playing.

Nadal caught the novel coronavirus in Abu Dhabi last week where he was playing in an exhibition tournament. Nadal said he would make a decision on his future tournaments depending on his "evolution" over the weeks ahead.

"I'm confident Rafa will be here," tournament organizer Tiley said of the 20-times Grand Slam champion at Melbourne Park on Wednesday.