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Four-time Olympic champion Mo Farah will defend his 10,000m title at the 2020 Tokyo Olympics.

Great Britain's Farah, 36, quit track events in 2017 to concentrate on the marathon.

But having won gold in the 5,000m and 10,000m at the 2012 and 2016 Olympics, he has decided to return to where he has been most successful.

"Next year, I'm going to be back on the track and I'm going to give it a go in the 10,000m," he said on

"Hopefully I haven't lost my speed but I will train hard for it and see what I can do. I'm really excited."

Farah, who is also a six-time world champion and has yet to run the marathon at a major championship, hinted earlier in the year that he could make the switch because he "missed" the frequency that track racing provided.

He finished eighth in the Chicago Marathon in October, having won it in 2018 in only his third race.

Farah, who will still need to qualify for the Tokyo Games, added: "It's been really exciting competing in the marathon over the last couple of years.

"To win the Chicago Marathon was nice and to finish third in the London Marathon was OK, and it's been a great learning curve for me."

Farah's track return also comes at a time when he has faced questions about his association with former coach Alberto Salazar, who has been banned for four years for doping violations.

Speaking before the Chicago Marathon, Farah said he had "not done anything wrong" and said there was an "agenda" against him.