Marta Kostyuk reaches Wimbledon quarter-final coached by Poland's Sandra Zaniewska

Ukrainian tennis player Marta Kostyuk has reached the quarter-final of Wimbledon 2025. Her success is partly attributed to Polish coach Sandra Zaniewska, who has worked with her for three years after being approached by the player's manager at Wimbledon. Zaniewska confirmed the partnership began with a trial period initiated at the grass-court Grand Slam three years ago.