In Tennis, World number one Novak Djokovic has crashed out of the first round of the Olympic men’s singles after he was overpowered by a resurgent Juan Martin del Potro.
The Argentine, who also defeated the Serb in the bronze medal play-off at the London 2012 games, won in two straight sets in the tie break, 7-6 7-6.
Djokovic, the top seed in Rio, left the court in tears.
Former US Open Winner, Del Potro, who has been plagued by two years of injury went in the match 141st in the world.
Djokovic’s defeat was not the only surprise.
In a day of upsets, the Williams sisters, Serena and Venus, also lost for the first time in an Olympics doubles match as their hopes of winning a fourth successive title were dashed.
They lost 6-3 6-4 to Lucie Safarova and Barbora Strycova from the Czech Republic.
In another shock defeat, Murray Brothers, Andy and Jamie, were also knocked out of the Olympic doubles. The British pair were beaten 7-6 7-6 to Brazilian duo Tomaz Bellucci and Andre Sa.