World No 1 tennis player Ash Barty has stunned the tennis world by announcing her retirement from the sport at the age of 25. She made the announcement during an emotional interview with fellow Australian tennis player Casey Dellacqua, which she shared on Instagram. ‘I’m so grateful to everything tennis has given me. It’s given me all of my dreams plus more,’ Barty said. ‘But I know that the time is right for me to step away and chase other dreams and to put the racquets down’