Khachanov said he preferred human line judges, saying the court feels “too alone without them”.
“I’m more for line umpires, to be honest,” he said. “You feel a little bit the court is too big, too alone without line umpires.
“At the same time looks like AI and electronic line calls has to be very precise and no mistakes, but we’ve seen a couple. That’s questionable why this is happening.”
However, Fritz felt electronic line calls were a welcome addition.
“There’s going to be some issues here and there,” he added. “I still think it’s much better to just have the electronic line calling, as opposed to the umpires, because I do like not having to think about challenging calls in the middle of points.
“The ball gets called, and we know, and that’s it.”
Some other players have previously been critical of the system.
British number one Emma Raducanu called it “dodgy”, while Switzerland’s Belinda Bencic said complaints about the technology are a topic in the locker room.
Raducanu was particularly unhappy when a shot from Aryna Sabalenka was judged to have clipped the line midway through the first set of her defeat by the world number one on Friday.
“That call was for sure out,” said the Briton after a closely-fought 7-6 (8-6) 6-4 loss, where she went toe-to-toe with the top seed for much of the match.
Asked if she trusted the electronic line calls, Raducanu added: “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?”