Every year since the first Wimbledon Championship in 1877, a male player with a one-handed backhand has featured in the singles semi-finals of a grand slam. That 149 year streak ended at this year’s US Open when Stefanos Tsitsipas, the last remaining single-hander in the draw, exited the tournament in the round of 16. This is a watershed moment for tennis, as it marks a break with the origins of the sport and the culmination of a five decades-lo…