Puerto Rico's Monica Puig, whose dream run to a gold medal was one of the feel-good stories of the Rio Games, came down to earth at the US Open tennis championship where China's Saisai Zheng dealt her a 6-4, 6-2 defeat in the first round.
The 22-year-old Puig was not in her best form entering the final Grand Slam event of the year and her performance on Monday confirmed the expectations of some tennis analysts.