Wimbledon 2017: Svetlana Kuznetsova accuses Garbine Muguruza of illegal coaching during match

London: Svetlana Kuznetsova noticed it. Her coach even complained about it during the second set, but Garbine Muguruza said she was not being coached by her team during Tuesday's 6-3, 6-4 quarterfinal victory at Wimbledon.

It's not the first time coaching during a match has been raised at Wimbledon this year. On Monday, Caroline Garcia said she did not see her father and coach signaling to her during her fourth-round loss to Johanna Konta.

Unlike on the WTA Tour, where coaches are allowed onto the court to speak to players during changeovers, communication is forbidden at Grand Slam tournaments. At the qualifying tournament for the next major, however, the US Open will experiment with letting coaches communicate with their players from the stands between points.