Naomi Osaka will extend her time working with coach Tomasz Wiktorowski after a great week at the Canadian Open, where she reached her first WTA 1000 final in three years.

The Frenchman, who has also coached Simona Halep and Stefanos Tsitsipas, recently spoke about Serena’s French Open title victory in 2013. On Instagram, Mouratoglou said: “With Serena we started ...