Swiss player Bencic said she was usually a fan of electronic calls, but in this tournament “it’s not right.”
“I don’t trust it either,” she said. “Of course you feel a little stupid questioning an electronic call, but of course it always depends on how it is installed and how accurate it is.
“It’s not just me, you know. I feel like I watch other matches too, and I see players saying the exact same thing, complaining. Or even on TV you can clearly see that some balls are out or long or something.
“We players talk about it and I think most of us feel the same way.”
British male number one Jack Draper also questioned the technology, saying afterwards his defeat in the second round against Marin Cilic Thursday: “I don’t think it’s 100% accurate, in all honesty.
“A few of them today showed a mark on the field. The chalk could never have been visible.”
Debbie Jevans, president of the All England Club, said she was confident in the accuracy of the electronic appeal line and the decision to introduce it.
“It’s funny isn’t it, because when we had linesmen we were constantly asked why we didn’t have an electronic call because it was more accurate than the rest of the tour,” she told BBC Sport on Saturday.
“The players wanted it because they were asking us: why do we have linesmen? Because of potential human error. And now we have it on site.
“We have to think about innovation and we simply move forward based on what the field expects and especially what the players expect.”
Some players have backed the system, with former world number one Iga Swiatek saying she had doubts but “has to trust them”.
