Nick Kyrgios has launched a fresh attack on Jannik Sinner and this time Lleyton Hewitt's son has been caught up in the row.
Jannik Sinner could be banned from tennis later this year and a Grand Slam great has given Tennis365 his verdict.
As Jannick Sinner and Iga Swiatek arrive in Melbourne following last year’s drug positives, the Australian open boss believes ...