Patrick Mouratoglou has hit back at Ian Tiriac after he claimed Serena Williams 'would retire if she had any decency.'
Williams has been a regular target for Tiriac, who is the owner of the Madrid Masters and former world number eight.
Earlier this month he went on the offensive again, criticising Williams for her physical shape and essentially saying she should no longer be playing on the WTA Tour.
Mouratoglou, though, Williams' coach, has bitten back, using social media to appear to address the comments rather than dignifying them with a direct response.
“A year ago today, Serena reached a new milestone: she won her first title as a mother, at the ASB Classic in Auckland," Mouratoglou said as a reminder that Williams continues to break down boundaries.
"She doesn’t need to prove anything at that stage – but she did prove the world that she still has it in her, no matter the circumstances, no matter the challenges.
"Let’s make 2021 a memorable one.”
Serena Williams will attempt to win a 24th Grand Slam singles title at the Australian Open next month, equalling Margaret Court's all-time record.
Williams, though, already holds that record for the Open Era.
For more exclusive content from Tennisbuzz, including news, features, trivia, promotions and more, please be sure to sign up for our newsletter below or via our home page.
Why not test your tennis knowledge by tackling one of our fiendish quizzes too?