Thomas Barr: 'It’s definitely my last Olympics, could be my last race'

Elsewhere, Jodie McCann endured a disappointing Olympic debut.

DISAPPOINTMENT: The Irish 4x400m mixed relay team of Chris O’Donnell, Sharlene Mawdsley, Sophie Becker and Thomas Barr after their Olympic Games heat. Picture: Sam Barnes/Sportsfile

There could be no regrets. They had given it their all, emptied every ounce of energy on the track at the Stade de France, but in the end it just wasn’t enough.

The Irish mixed 4x400m relay team of Chris O’Donnell, Sophie Becker, Thomas Barr and Sharlene Mawdsley fell short of qualification for the Olympic final in Paris this evening, finishing fifth in their heat in 3:12.67, 10th overall. The race was won by Britain in 3:10.61, with the US setting a world record in the first heat of 3:07.41.