Juan Martin del Potro, who will face Bernard Tomic in the final of Sydney, believes the 21-year-old Australian has a chance to upset world No. 1 Rafael Nadal in first round of the Australian Open.

Tomic himself refused to talk about the subject, except to say that it will be a difficult match and that he will address it after the Sydney final. Del Potro is in the same Australian Open quarterfinal as Nadal and Tomic.

“He's very smart,” Del Potro said of Tomic. “For sure it's going to be a great experience for him playing on center court against the No. 1 in the world. And also he has the chance to beat Nadal. He's a great player. I think if he has to take one place to have chance to beat Rafa, maybe he will take Melbourne on the Rod Laver Arena. Could be a good chance for him. Also Rafa is really tough player. First round Grand Slam, five sets, it's not easy to beat him.”