Nineteen-year-old Marin Cilic sent a racket-smashing Andy Roddick out of the Toronto Masters on Thursday.
The Croat won the third round match 6-4, 4-6, 6-4.
Sania vows to win an Olympic medal
Cilic, who has been at the site for a week, staying with coach Bob Brett at the York University campus to train, clinched victory with a forehand winner in a little under two hours.
"I started well and got up a break in the second set but I lost focus," said the 19-year-old.
"He was playing better. It was windy today and tough to serve. But I got back into it in the third set, went up a break and was able to focus until the end."
Photographs: Getty Images