Keane fails to fire as Brownlees dominate
British brothers Alistair and Jonny Brownlee took triathlon gold and silver respectively as Ireland's Bryan Keane finished his first Olympics in the lower half of the table.
The 36-year-old recorded a time of 1:52:09 for 40th position yesterday - a car crash caused the Corkman to miss out on qualification for London 2012.
Keane managed to climb up the leaderboard in the 40km cycling stage but failed to go any further than his final position.
Alistair Brownlee became the first triathlete to retain an Olympic title as he led brother Jonny home.
The brothers, who finished first and third in London, did not put a foot wrong in front of packed crowds on Copacabana.
It came down to a race between them and Alistair made his break on the third lap of the run, pulling away to claim a dominant victory.
Jonny comfortably held on for silver, making the brothers the first to finish one and two at an Olympics since Italians Piero and Raimondo D'Inzeo of Italy in equestrian in 1960.
It has not been a smooth four years for Alistair since London, with injuries a frequent problem, and last summer he took the decision to have ankle surgery.
His biggest rival, Javier Gomez of Spain, the silver medallist in London and a five-time world champion, was expected to be the big danger again but he was forced to miss Rio after fracturing his elbow in a training fall.
Meanwhile, Natalya Coyle will enter this afternoon's modern pentathlon in a strong position, lying in 12th place overall following yesterday's fencing stage.
The 25-year-old ended the day with a record of 19 wins and 16 defeats after 35 contests, leaving her with a total of 214 points.
Coyle dropped seven out of nine points in the middle of the session, but finished strongly during the evening.
In the men's event, Arthur Lanigan-O'Keeffe had a total of 16 wins and 19 defeats after a day's fencing.
The Kilkenny man, who is reigning European Champion, collected 196 points in the first day of the Olympic event, to leave him in 25th position overall.
The 24-year-old got off to a flyer taking an early lead with five victories and two defeats, but he will face a battle to move up the table. Lanigan-O'Keeffe and Coyle now face a final round of swimming, showjumping, shooting and running.