RIO DE JANEIRO (AP) — The Latest from the Olympics in Rio de Janeiro (all times local):
6:20 p.m.
Fourth-ranked Stan Wawrinka is withdrawing from the Olympics because of injury, leaving the Rio Games without half of the ATP's top 10.
The two-time major champion Wawrinka joins Swiss teammate Roger Federer in skipping the games. They won a doubles gold medal together at the Beijing Olympics in 2008.
Another Swiss tennis player, Belinda Bencic, has also pulled out of the Rio Games.
A statement issued by Wawrinka's management company says he "felt increasing pain" during the Rogers Cup in Toronto last week and was told by his doctor after an MRI exam to "reduce his physical activity for an undetermined period.