Kaori Icho won a historic fourth straight gold medal and Japan claimed a clean sweep on the wrestling mat as Eri Tosaka and Sara Dosho also topped the podium at the Rio Olympics on Wednesday.

Icho became the first woman to capture individual gold medals at four consecutive Olympics in any sport when she beat Koblova Zholobova of Russia to win the women's 58-kg freestyle competition, and the first wrestler ever to win four titles at the Summer Games.

"I'm relieved," said Icho, who came within seconds of losing only to pull off a dramatic victory. "I'm sorry and frustrated that I couldn't produce a better performance because that was pretty bad.