Despite the other grand slams relying on technology for their line calls, French Open director Amelie Mauresmo is still happy with her human line judges despite a controversial miss costing Casper Ruud.

Ruud and Fonseca's thrilling fourth-round match was caught up in yet another electronic-line-calling-on-clay controversy.

The French Open chair umpire made a decisive ruling to deny Casper Ruud the second set, with Joao Fonseca running out a winner in four sets to reach the quarter-finals