Live updates of day 14 of the Rio Olympics as Eliza McCartney adds another medal to New Zealand's record haul.

Eliza McCartney has won bronze in the pole vault final and Usain Bolt has won his third gold of the Games - and completed a unique triple-triple - in what's likely his final Olympic event, the 4x100m relay final.

Day 14 of the Rio Games has seen the emergence of a new Kiwi medal contender, and a late revival of Lydia Ko's medal hopes.

The first hole in one of her career has helped Ko surge up the leaderboard in the third round of the Rio Olympics golf tournament and into medal contention.

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Ko - who started the day at three-under - aced the par-three eighth hole to move to nine-under for the tournament this morning, and is now one shot off the lead in third after signing for a six-under 65.

The 19-year-old world No 1 found form with her putter on the front nine at Marapendi Reserve Golf Course to birdie three of her first six holes, before her eagle at the 154-yard eighth and another birdie at the ninth moved her further up the leaderboard. She did all her work on the outward nine, carding a 29, before nine straight pars on the back nine.

New Zealand's first ever women's K4 sprint canoe team booked their place in the Olympic 500m final after two highly impressive races.