The automatic line-calling at Wimbledon failed during Sonay Kartal’s last-16 clash with Anastasia Pavlyuchenkova.
Line judges are not being used at the All-England Club for the first time in its 148-year history.
The umpire halted the match and checked the technology was workingBBC Pavlyuchenkova was convinced the shot was long and was proved rightGettyThis is because they have been replaced by an electronic line calling system.
This uses cameras, computers and sensors to track the ball’s trajectory – similar to what is used in cricket’s HawkEye system.
Up to 18 cameras are used on each court to project where the ball lands in real time, with an automated voice calling out.
This system quite clearly failed during the Centre Court match on Sunday with a ball landing nearly a foot out, but no call came.
The umpire immediately stopped the play at the crucial juncture in the match with Pavlyuchenkova having the deuce advantage on her serve to make it 5-4.
A call was immediately made by the umpire to check the system was in effect, after several minutes he announced the point would be replayed.
He said: “Ladies and gentlemen, thank you very much for your patience. The automatic line calling system was unable to track the last point so we are replaying the point.”
“Oh wow. That is unexpected,” The BBC commentator said.
Two-time US Open champion Tracy Austin said: “They should just look at the video review and they can see it was a foot out. That game should be over.”
The automatic line calling system has come under huge scrutiny at Wimbledon, with many players refusing to trust it.
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Replays showed just how out the shot wasBBCEmma Raducanu believed it had got a number of calls wrong during her defeat to Aryna Sabalenka.
“That call was for sure out,” Raducanu said.
“It’s kind of disappointing that the calls can be so wrong, but for the most part they’ve been OK. I’ve had a few in my other matches, too, that have been very wrong. Hopefully they can fix that.”
Asked if she trusted the electronic line calls, Raducanu replied: “No, I don’t – I think the other players would say the same thing, there were some pretty dodgy ones but what can you do?”
Britain’s Jack Draper also said he didn’t trust it after his second round defeat to Maran Cilic.
“I don’t think it’s 100 per cent accurate, in all honesty,” he said.
Line judges are on hand if the technology failsGetty“A couple of the ones today it showed a mark on the court. There’s no way the chalk would have showed.”
Debbie Jevans, chair of the All England Club, said she had confidence in the system.
“It’s funny, isn’t it, because when we did have linesmen, we were constantly asked why we didn’t have electronic line calling because it’s more accurate than they do the rest of the tour,” she told BBC Sport.
“The players wanted it because they were asking us, why do we have linesmen? Because of potential human error. And now we have it in situ.
“We have to think of innovation and we’re just moving with what the court and mostly what the players expect.”
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