Tennis - French Open - Roland Garros, Paris, France - June 3, 2017 Great Britain's Andy Murray in action during his third round match against Argentina's Juan Martin Del Potro Reuters / Benoit Tessier

World number one Andy Murray will need to keep his guard up when he takes on rising star Karen Khachanov for a spot in the last eight with the Russian having already caused two upsets on his French Open debut.

The 21-year-old, ranked 53rd in the world, eliminated 13th-seed Tomas Berdych in round two before beating big-serving John Isner, seeded 21st, in four sets.

Murray’s match on Court Philippe Chatrier, however, is not the highlight for the local fans, with Frenchman Gael Monfils taking on third-seed Stanlisas Wawrinka in their fourth round clash.

Monfils, a semi-finalist in 2008, reached the last 16 after fellow countryman Richard Gasquet retired due to a thigh injury midway through the third set.

Second seed Karolina Pliskova faces Paraguay’s Veronica Cepede Royg for a place in the last eight.