When there were line judges, players could challenge calls by using an electronic review. There are no challenges under the current system, and video replays are not used.
Former Wimbledon champion Pat Cash, speaking on BBC One’s coverage, said it was “mind-boggling” the chair umpire did not call the ball out himself.
“The chair umpire is there for that reason,” he said.
“It was clearly out so I don’t understand why he couldn’t just call it out, call the game and sort it out at the change of ends.
“So what if the machine didn’t say it? It was so far out and right in front of his face.”
Pavlyuchenkova suggested tennis should use video checks like football does “so that we can review the point”.
“On such a big event I think it is necessary, since this isn’t the first time this has happened,” she told BBC Sport.
She said umpires were there to make big decisions otherwise they could “just play without them”, adding: “I think the chair umpire should be able to take initiatives.
“That’s what he is there for and that’s why he is sitting in that chair, otherwise I think we could have also had a match without a chair umpire.”