Former world number one Andy Murray has signed a new eight-year deal with Castore worth £8 million ($10,5 million).
The Scottish superstar ended the contract with Under Armour in January 2019 and he has since inked a deal with the British brand.
Murray, who has won three Grand Slam titles, is looking forward to working with Castore after dumping American company, Under Armour.
“Castore is a young, exciting brand that offers something different, with products that are really well cut and designed,” said Murray on Tennis World.
“For me it was a natural progression from previous kit partners. They’re the best I have tried and trained in.
"I am looking forward to working with their design team on the tennis line and to be part of a British success story."
Murray lost his Australian Open first round match against 22nd seed Roberto Bautista Agut while struggling with a hip injury earlier this year.
The 31-year-old underwent hip resurfacing surgery in London, England two months ago as he looks to return to competitive tennis.