DANNY Talbot is hunting a world championship medal tonight after Great Britain's quartet shone in the men's 4x100m relay heats at London Stadium this morning.

The British four - Talbot, Adam Gemili, Nethaneel Mitchell-Blake and CJ Ujah - qualified second behind the USA in 37.76secs in the first heat.

It was the second fastest time ever by a British quartet and Talbot, who bowed out of the 200m in the semi finals on Wednesday, feels the team can challenge for honours in front of their home support this evening.

"Definitely, that's what we focus on, that's what we want to do. It's a great time to do it in front of a home crowd so hopefully we can do it this evening," Talbot told the crowd during a trackside interview.

Usain Bolt started the final countdown to his retirement by guiding Jamaica through to the 4x100m relay final.

The eight-time Olympic champion anchored the squad to victory in the second heat.

Jamaica finished in 37.95 seconds - slower than Great Britain and the USA from the first heat - but will be expected to challenge for the podium in Saturday evening's final - Bolt's last race of his career.

"For me it's hard to be sad because of the energy I am getting from the crowd, I just feel happy and blessed," Bolt said in a trackside interview.

"It's been brilliant, the energy in the stadium is outstanding. I knew it was going to be like this, I appreciate you guys coming out and supporting not just me but the whole World Championships."