Roger Federer has restated his position against on-court coaching after being asked about the idea at Indian Wells.
"Yeah, I hope we stay far away from that idea," he said.
Federer said he was against using it on the ATP because of the possibility that it might be a disadvantage for lower-ranked players and hurt the tour's credibility.
"I don't think it's fair maybe necessarily, because not everybody can afford a coach," he said. "It's just not right. We'll see girlfriends walking out, we'll see parents walking out.
"It's not going to be pretty, you know. It just won't. It will look amateur-like, in my opinion."
On-court coaching is allowed at WTA events.
"Maybe commentary likes it," said Federer, adding, "You can look over to your coach for comfort and support, but other than that, I think tennis could or should be one of those unique sports where you don't get coaching."