Casper Ruud suffered a costly call at the French Open, losing to João Fonseca 7-5, 7-6(8), 5-7, 6-2.

What happened?

The controversy erupted during the second set tiebreak, with Ruud holding a set point at 8-7.

A forehand from Fonseca was called out by a spectator, but chair umpire Louise Engzell ruled it in, erasing Ruud's set point.

Why it matters for Casper Ruud

The call was later shown to be incorrect by a Hawk-Eye replay, adding to the drama and sparking a debate about the use of electronic line calling.

Former world No. 1 Jim Courier criticized the decision not to use electronic line calling, emphasizing that match results should not be determined by human error.

Courier stated that electronic line calling makes far fewer mistakes than humans and that matches should be decided by the players, not by people.

What comes next?

The French Open's decision to retain human line judges has been questioned by many, including tennis journalist Myles David, who accused the tournament of consistently lagging behind the other Grand Slams in implementing modern innovations.

Former world No. 3 Pam Shriver backed David's sentiment, condemning the "pattern of inflexibility" shown by the French Open.

Andy Roddick also weighed in on the controversy, stressing the consequences of the disputed line call for Ruud, saying that if electronic line calling was used, the score would have been 1-1, not 2-0 for Fonseca.

But former doubles world No. 1 Paul McNamee disagreed with Courier, arguing that technology is not infallible either.

The controversy has sparked a heated debate in the tennis community, with many calling for the adoption of electronic line calling at the French Open.

As of the 2026 French Open, the tournament remains the only Grand Slam not to use electronic line calling.

The use of human line judges has been a topic of discussion for several years, with many arguing that it is time for the French Open to modernize.

The French Open's decision to retain human line judges has been questioned by many, including players, coaches, and journalists.

The tournament's organizers will likely face increased pressure to adopt electronic line calling in the future.

Casper Ruud's loss to João Fonseca has highlighted the need for accurate and reliable line calling in tennis.

The use of electronic line calling could help to reduce controversy and ensure that matches are decided fairly.

The debate over electronic line calling is likely to continue in the coming months and years.