The tournament is taking place in Paris.
The men's semi finals take place today at the French Open in Paris.
13 time champion Rafael Nadal of Spain faces Germany's Alexander Zverev.
Nadal turns 36 today and is bidding for a 22nd Grand Slam title.
The other last four encounter sees Norway's Casper Ruud to go head to head with Croatia's Marin Cilic.

Monday Evening Sports Update
Kildare U16s Power to Leinster A Football Title
Kildare Minors Crowned Leinster B Camogie Champions
All Ireland SFC Draw
Mawdsley Powers Ireland to World Championships Qualification
Mainoo Fires Man United to Win Over Liverpool
Leinster Set for Champions Cup Clash with Bordeaux-Begles
Scottish Title Race Tightens as Celtic Move Level