South Africa’s Kevin Anderson booked a quarter-final berth at the Indian Wells Masters on Wednesday with a 6-3 1-6 6-4 victory over 13th-seeded Frenchman Gilles Simon.

Anderson, one of three unseeded players remaining in the men’s field of the combined ATP Masters and WTA tournament, reached the quarter-finals of an elite Masters event for the second time.

Anderson, who had surgery in January to remove bone chips from his right elbow, had already ousted world No.4 David Ferrer in the second round.

In the quarter-finals, he’ll face either sixth-seeded Czech Tomas Berdych or 10th-seeded Richard Gasquet of France.