Emma Raducanu's absence from two major tournaments has reignited retirement speculations at the age of 23. There is a growing sentiment that the British tennis star may hang up her tennis racket following injuries that made her miss Wimbledon. She is also expected to skip the US Open, which starts on Sunday, 23 August, and the Billie Jean King Cup in Shenzhen, China this September. 'Well, put it this way. I mean, I've got no access to that camp …