Thomas Barr is through to the men's 400 metre hurdles semi-final in Doha.

The Waterford athlete set a time of 49:41 to finish second in Heat 1 behind reigning world champion Karsten Warholm of Norway.

It was more than enough for the 27-year-old to advance to the next stage, as the Top 4 in his heat qualified.

"They'll be dropping a couple of gears tomorrow. I'm quietly confident."

Mission accomplished for @TomBarr247 who marches on to a world semi-final after finishing 2nd in 49.41 to world champion Karsten Warholm 🇮🇪👌🇮🇪 pic.twitter.com/Y1yCAsfMzy

— Athletics Ireland (@irishathletics) September 27, 2019

Onwards to Semi-Final

Ireland's Thomas Barr on the way to finishing second to qualify behind Norway's Karsten Warholm ©INPHO/Morgan Treacy

Only four athletes set a faster time than Barr in the four qualifying heats.

The semi-finals will take place at 4:05pm Irish time on Saturday, and the final on Monday.

Ireland's Michelle Finn on her way to finishing ninth and failing to qualify for the final ©INPHO/Morgan Treacy

Meanwhile, Michelle Finn finished ninth in her Women's 3000 metre steeplechase heat.

The Cork athlete set a time of 9:47:44. Kenya's Beatrice Chepkoech led the way in the heat in a time of 9:18:01.

On Saturday, Donegal's Mark English's 800 metre heat takes place at 5:36pm Irish time.

And at 9.30pm Irish time, it's the turn of Brendan Boyce in the 50km race walk final.