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Jessica Ennis-Hill is set to decide on her athletics future after failing to retain her Olympic heptathlon title.
Ennis-Hill's victory in the final discipline of the event, the 800m, was insufficient for the Briton, as Belgium's Nafi Thiam took gold, 35 points in front.
Canada's Brianne Theisen-Eaton secured silver, with Ennis-Hill's Great Britain teammate, Katarina Johnson-Thompson, finishing back in sixth place.
Ennis Hill said afterwards: "It's going to be a tough decision. I'm going to go away and think about it.
"At this moment, I'm tired and emotional. It's a big decision."
There was glory for Britain in the 10,000m, however, as Mo Farah grabbed his third title despite taking a tumble midway through the final. Kenya's Paul Tanui finished second, with Ethiopia's Tamirat Tola securing bronze.
Farah is the first British track and field athlete to win three gold medals at the Olympics.
Jamaica's Elaine Thompson won the women's 100m, ahead of Tori Bowie and Shelly-Ann Fraser-Pryce.
In the velodrome, the GB women's pursuit team of Laura Trott, Joanna Rowsell-Shand, Elinor Barker and Katie Archibald beat the United States in the final, setting a new world record.
In triumphing, Trott became the first British woman to win three Olympic gold medals.
Swimmer Michael Phelps secured his 23rd gold, winning as part of the American team in the 4x100m medley relay.
For Ireland, Scott Evans booked a last-16 badminton spot with a 2-1 victory over Brazil's Ygor Coelho de Oliveira, but there was disappointment for Mark English, who finished fifth in his men’s 800m semi-final and failed to make the final.