Usain Bolt retired from athletics earlier this year in rather unfortunate circumstances.

After dominating the sport for much of his career, the sprint-king was not at his imperious best in London as he relinquished his 100m crown to Justin Gatlin.

And in his last ever race, the Jamaican pulled up in the 4x100m relay with a hamstring injury.

It was a sad end to what was a remarkable career, but the episode did not tarnish his reputation as the greatest ever track star.

With Bolt announcing his retirement in early 2015, in the past few years there has been much speculation to what he may do after he calls his athletics career quits.

The 100m and 200m world-record holder has previously confirmed his attentions to pursue a career in football, and that possibility seems to have escalated in recent weeks.

And yesterday, whilst in attendance at the Austin Grand Prix, Bolt shed more light about a future career in football.

Bolt said: "It's a dream, it's another chapter of my life that I really want to do. If you have a dream or something you really want to do, you want try to see where it could go.

"My hamstring is just keeping back right now, in two weeks I can train again and get back to some shape, then I can really explore that situation.

And Bolt also confirmed that an offer of a trial with Bundesliga giants Borussia Dortmund remains in place.

Bolt continued: "'They (Borussia Dortmund) said the invitation is always open, so it is all about me getting over my injury and into shape. Then I can explore it and do the trials and see what level I am at.

"For me it's just to try to see if I really can be one of the best, anything I am doing, I'll try to do it at my best."

The German club offered Bolt a trial back in November, but Dortmund's CEO, Hans-Joachim Watzke, has reiterated that despite his hamstring injury, he is still welcome to trial at the club.

Speaking to Reviersport, per the Sun, he said: "Our word is our bond.

"I will meet [Puma CEO] Bjorn Gulden this week. And that's on our list."

With Bolt nearing a return from the hamstring injury he suffered in London a few months ago, we could well see the Jamaican on a football pitch very soon.