Swede Jorgen Persson won his men's singles table tennis match on Saturday as he searches for his first Olympic medal.
Persson has participated in every Olympic table tennis competition since the sport was introduced at the 1988 Seoul Games. He has never finished higher than fourth, but the 46-year-old is into the second round.
Great Britain's Paul Drinkhall also moved on after a victory.
The U.S. saw its participant pool cut in half on the women's side. Ariel Hsing advanced on Saturday, but 16-year-old Lily Zhang, the youngest table tennis player at the 2012 Games, was knocked out of the first round.
The hosts also have a woman into the second round in Joanna Parker.
The women's side also featured a few second-round matchups on Saturday, with eight players moving on.