McEnroe doubts Sharapova was unaware of meldonium ban

"Would be hard to believe that no one in her camp, the 25 or 30 people that work for her, or Maria herself had no idea that this happened," McEnroe told the Tennis Channel Saturday during the BNP Paribas Open. McEnroe noted that at the 1990 Australian Open he was ejected from a match after he did not realise a rule change that reduced a player's default from four steps to just three.

"Nobody told me, so it is possible that Maria did not know that, though it's extremely doubtful," he said. Sharapova, 28, is facing a suspension of up to four years by the International Tennis Federation (ITF) and has already lost numerous sponsorships in the aftermath.

McEnroe joked that Sharapova should only be banned for two years because she says she did it unknowingly. "Lift the ban, there's no suspension if when she comes back she promises not to grunt," McEnroe added in jest. "If you don't grunt Maria, no suspension. If you continue to grunt, two years."

(Writing by Jahmal Corner in Los Angeles; editing by Amlan Chakraborty)