Australia's Ariarne Timus upsets USA's Katie Ledecky to win Olympic gold in 400m freestyle.
Defending Champions team USA was defeated by team France lead by Evan Fournier
in men's opener.
Top-ranked tennis star Ash Barty has been upset by 48-th ranked Spain's Sara Sorribes in the first round.
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Table Tennis powerhouse China was defeated by host nation Japan to clinch the gold medal.
Austria's Anna Kiesenhofer wins shock cycling gold, defeating favorites.