Milos Raonic progressed to the third round of the Sony Open in Key Biscayne after the Canadian saw off the challenge of Jack Sock in straight sets.

The 23-year-old, who lost to Alexandr Dolgopolov in the quarter-finals of the Indian Wells Masters last week, served up seven aces in a strong opening set, as Sock struggled to live with Raonic's shots before losing the set 6-4.

The American qualifier made a contest of the second set as both players held serve to set up a tie-break.

However, Sock was unable to compete in the tie-breaker as Raonic won it 7-1 to reach the third round and set up a clash with Guillermo Garcia-Lopez.