Peter Psaltis, who coached Ash Barty when she was a young tennis player, has weighed in on Karolína Muchová's controversial medical break in today's quarter-final game. 

<p>Peter Psaltis, who coached Ash Barty when she was a young tennis player, has weighed in on Karol&iacute;na Muchov&aacute;'s controversial medical break in today's quarter-final game.&nbsp;</p>

Join Brisbane's own Bill McDonald each morning from 9am as he tackles the biggest local issues of the day.

<p>Join Brisbane's own Bill McDonald each morning from 9am as he tackles the biggest local issues of the day.</p>

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