World number two Carlos Alcaraz is to have tests on his ankle after sustaining an injury that forced him to retire from his Rio Open first-round match against Thiago Monteiro on Tuesday. The reigning Wimbledon champion needed medical attention after twisting his right ankle on the second point of the contest. He returned to the court a little later with heavy strapping and broke Monteiro’s serve, but after dropping his own in the next game, he decided to call it
