Having outlasted most of his contemporaries, Roger Federer is now in the business of educating the next generation. It is not just the tennis he plays, but his clear-eyed analysis, which he used to gently chide Nick Kyrgios.

Asked about Kyrgios's presence in the Channel Nine commentary box during his rapid 6-2, 7-5, 6-2 win over Taylor Fritz, Federer expressed mild frustration at all the talent being wasted.

"We need him to play first before commentating, for the next 10 years," said Federer. "Look, I like Nick. I like the way he plays. Yeah, I was happy to hear that he was in the commentary booth. He's got a bit of time, sticks around, shows he's passionate about the game. But we wish he was on the court rather than in a commentary booth."