Usually it's fiancee Katie Boulter who draws all the attention in Alex de Minaur's player's box at the Australian Open. But on Monday night it was his mum Esther who stole the show in a viral moment.

Alex de Minaur gave a cute nod to his fiance, Katie Boulter, after reaching his first Australian Open quarter-final. The world No. 8 downed rising star Alex Michelsen 6-0 7-6 (5) 6-3 on Monday to break new ground at his home Grand Slam tournament.

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British No. 1 women’s player Katie Boulter was joined by her fiancé, fellow tennis pro Alex de Minaur, as she battled into the Australian Open second-round

Jelena Dokic pointed to the recent success of Alex de Minaur and Katie Boulter on Thursday to slap down suggestions Stefanos Tsitsipas and Paula Badosa have struggled on the court due to their relationship. However her comments came before Boulter suffered a shock 3-6 (3-7) 6-2 2-6 loss to Veronika Kudermetova to crash out of the tournament.

Alex de Minaur busted through his Australian Open fourth-round ceiling with a brutal display against Alex Michelsen. Now, a date with world No. 1 Jannik Sinner looms.

Watch the match highlights between Alex Michelsen & Alex de Minaur in Round 4 of the 2025 Australian Open Men's Singles Tournament Tennis.

Everything you need to know as Alex de Minaur continues his Australian Open campaign against American youngster Alex Michelsen.