The French Open is the only Grand Slam without Hawkeye, the electronic-line calling system that deems whether balls are in or out.
Hawkeye technology exists at Roland Garros but is there only for broadcasters to employ to aid their TV coverage.
Instead, umpires rely on marks left on court to aid their decision-making.
But it’s understood that 10-time French Open champion Nadal disagrees with the ruling not to use it and would prefer it if Hawkeye was available.
The 2012 French Open champion Maria Sharapova has previously called for Hawkeye to be used.
She said a year after winning the tournament: “Why don’t we have a system like this?
“I mean, is it a money concern? I don’t think so. This is just absolute proof that it’s a big point and it can happen in any situation.”
How does Hawkeye work?
Peter Irwin, a member of the Hawkeye team, explained how the system worked in an interview with The New York Times.
He said: “One thing that’s integral to our system is we measure the court, but we also measure the undulations in the ground.
“So when you play on clay. Obviously, the ground is constantly changing, so that would require a lot more work from our side. We would constantly have to recalibrate the system if it were to be used for officiating.
“On a hard court, we do it once at the start of the tournament because the surface doesn’t change. On grass, we do constantly calibrate throughout, but clay is just a lot more.”
Source : EXPRESS