Jannik Sinner has hired Darren Cahill as his full-time coach. Sinner split with longtime coach Riccardo Piatti earlier this year. Sinner started working with Cahill a few weeks before the 2023 Wimbledon Championships.

Simone Vagnozzi will continue to be part of Sinner’s coaching team. But Darren Cahill is expected to work longterm with Sinner. After the partnership with Cahill, Sinner has improved his serve and has attacked the net more often.

Though Sinner has been ranked in the top 10 in the world and has reached the quarterfinals at multiple grand slams, he is yet to win a grand slam. He has been looking to add variety to his aggressive game and ultimately win a grand slam.

Cahill has coached many top players including Andre Agassi and Lleyton Hewitt. Recently, he coached Simona Halep and helped her win two grand slam titles.

Daniel Altmaier reached the fourth round of the French Open in 2020 surprising many tennis fans. He reached his peak ranking of world number 53 in 2022.

Altmaier s one of the few players on the tour with a one-handed backhand. His idols growing up were Roger Federer and Stan Wawrinka. He is represented by management agency Starwing Sports. He is sponsored by Yonex. He has earned over $2 million in his career.

Daniel Altmaier’s Sponsors

Yonex

He has a head-to-toe sponsorship deal with Yonex. He uses Yonex racquets and wears Yonex apparel and shoes.