Anguish for beaten Pongprayoon

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China's Zou Shiming has retained his light-flyweight Olympic title after claiming a controversial victory in the gold medal match against Thailand's Kaeo Pongprayoon.

Zou followed up his success in Beijing four years ago with a 13-10 success over Pongprayoon, though the decision was greeted by a chorus of boos at ExCeL after a bout where Pongprayoon seemed to have the better of at least two of the three rounds.
Zou, the top seed and world champion, was nevertheless awarded all three rounds.
A warning in the third round for negative tactics appeared to give Pongprayoon a chance of victory but just moments later he was given the same penalty.
Zou was given the first two rounds by scores of 2-1 and 4-3 but appeared to be well on the back foot in the closer, repeatedly attempting to evade the attacks of his opponent and twice slipping to the ground to force a break in proceedings.
But after warnings for both men saw them trade two-point penalties, Zou again came out on top in the third, extending his lead to three points.
The decision was met with derision by the neutrals in the arena, with Pongprayoon's coach lifting his charge's arm in the air to loud applause.
Britain's Luke Campbell won the gold medal in the men's bantamweight with Ireland's John Joe Nevin settling for the silver.
Campbell realised his lifetime dream as he floored Nevin on his way to a 14-11 victory and the Olympic bantamweight title at ExCeL.
Campbell landed a superb left hand counter in the final round to floor his opponent, who had beaten him in 2009 before the Hull man gained revenge with a close win in last year's World Championship semi-finals.
Ukrainian top seed Oleksandr Usyk claimed the prestigious heavyweight gold after seeing off the committed Italian Clemente Russo.
It was a contest befitting the stage, Usyk the reigning world champion taking on the silver medallist from Beijing.
He closed out a 14-11 victory in the final round as Russo, looking to force the win, missed with a series of big hooks only to be caught by his more measured rival on more than one occasion.
Usyk then celebrated victory with a dance in the middle of the ring, while Russo appeared content with his second successive Olympic silver.
Usyk's compatriot Denys Berinchyk had earlier performed a similar mid-ring routine, but only after losing his light-welterweight gold medal match to classy Cuban Roniel Iglesias.
The judges awarded the bout to Iglesias by a handsome score of 22-15, but it did not flatter the 23-year-old - who had lost to the same opponent in last year's World Championships.
Berinchyk went on to take silver in Baku and had to settle for the same here as Iglesias - the bronze medallist in Beijing four years ago - made 11 scoring shots in a one-sided final round that saw the Ukrainian's defence fall to pieces.
Iglesias had done enough to edge the first two rounds by a point apiece but in the closing stages the reigning Pan-American champion kept connecting, most obviously with a thunderous left-hand counter, to win in style.
And Japan's Ryota Murata won the gold medal in the men's middleweight division.