Marin Cilic clenches his fist as he plays South Africa's Kevin Anderson. Photo: Christophe Ena/AP

Croatian seventh seed Marin Cilic reached his first French Open quarter-final on Monday when South African opponent Kevin Anderson suffered a thigh injury and retired from their last-16 clash.

Cilic was leading 6-3, 3-0 after just 48 minutes when Anderson called it quits.

Cilic is the first Croatian man in the quarter-finals since Mario Ancic and Ivan Ljubicic in 2006.

He will face either third seed and 2015 champion Stan Wawrinka or Gael Monfils for a place in the semi-finals.