As Jannik Sinner took a moment to contemplate his brilliant defence of the Australian Open beside the Yarra River on Monday, the Italian star expressed that he and his esteemed Australian coach, Darren Cahill, share a familial bond.
The world No.1 hinted that he may attempt to persuade the respected 59-year-old to extend his coaching tenure beyond this year, despite Cahill’s stated intentions to retire.
Cahill commenced what is likely his final year as a coach with remarkable success, guiding the 23-year-old Sinner to a straight-sets victory over Germany’s Alexander Zverev on Sunday night, winning 6-3, 7-6(4), 6-3 on Rod Laver Arena.
Since Sinner teamed up with Cahill in 2022, he has ascended to the top of the world rankings and secured three Grand Slam titles.
“I think coaching happens both on and off the court. A good coach has to not only understand the player but also the team dynamic. He [Cahill] is remarkably humble in that regard,” Sinner told reporters in Melbourne on Monday.
“He’s demonstrated this with me and many other players as well.”
“I’m learning so much from him, and I simply strive to give my best.”

Jannik Sinner and Darren Cahill share a moment after the Italian clinched victory at the 2025 Australian Open. Getty
“Ultimately, we’re not just a coach and player duo; we’re more like family,” Sinner added.
“The synergy between him and Simone [Vagnozzi, Sinner’s co-coach] is exceptional. There’s a deep mutual respect that sets him apart.”
When discussing the possibility of Cahill reconsidering his retirement, the three-time Grand Slam champion remarked: “We’ll have to wait and see.”
The jovial young player had even teased Cahill about reconsidering his retirement plans during his victory speech on Sunday evening.
“Darren, I know this is probably, maybe, your last Australian Open as a coach, and I’m extremely pleased to share this trophy with you,” Sinner said, grinning.
“Everything began to transform when I made my move to work with Darren and [co-coach] Simone. The partnership between the two of you is remarkable.”

Jannik Sinner proudly displaying the Australian Open trophy on the banks of the Yarra River. Luis Enrique Ascui
Cahill has a rich coaching history, having previously guided former world No.1s including Lleyton Hewitt, Andre Agassi, and Simona Halep.
In a recent discussion on a Nine panel alongside Jim Courier, Todd Woodbridge, and James Bracey, Sinner mentioned that he aims to enhance his second serve and “make more approaches to the net”.
The top seed expressed having “immense trust” in both Cahill and Vagnozzi.
“Without trust between the player, the coaches, and everyone involved, making progress becomes very challenging,” Sinner stated.
“They are incredibly astute individuals. Coaching transcends mere tactics; it also encompasses off-court insights. They possess a wealth of experience, which helps immensely during tougher times.”
“Simone’s approach is somewhat different. He’s been instrumental in developing me [to be] a better player and introducing me to new skills.”
“Having such a remarkable blend of these two coaches is simply outstanding.”
Compiled by SportArena.com.au.
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