|London Marathon 2019|
|Date: Sunday, 28 April Start times: Wheelchair races 09:05, women's race 09:25 and men's race and masses 10:10 BST|
|Coverage: Follow live on BBC One, BBC Two, BBC iPlayer, BBC Radio 5 Live Sports Extra, BBC Red Button and online. Full details.|
Four-time Olympic champion Mo Farah has hinted that he may come out of retirement from track events and compete at Tokyo 2020.
Briton Farah, 36, quit in 2017 to concentrate on road races, and will compete in Sunday's London Marathon.
He won gold in the 5,000m and 10,000m at the 2012 and 2016 Olympics.
Farah told BBC Sport: "If I was capable of getting an Olympic medal no matter what colour it is, would you turn it down? If I am capable then why not?"
In an interview with Steve Cram, he said: "It would be nice to have another one.
"I have no regrets with what I have done but I don't want to look back one day and think, 'that year, I was fit, perhaps I should have gone to the Olympics, maybe I could have won a medal'."
Farah hinted in March that he may return to the track for September's World Championships in Qatar.
He said on Wednesday: "If everything goes well for me, why not?"
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'Missing' competing on track
Six-time world champion Farah, who finished third in the London Marathon last year, has yet to compete at a major championships over the 26.2-mile distance.
He ran two hours five minutes 11 seconds to win the Chicago Marathon in October, a victory he says gave him "massive confidence" for London.
Great Britain's officials will meet early next week to discuss selections for the World Championships in Doha.
The marathon takes place on 29 September and the Chicago Marathon on 13 October.
Asked if he will be part of conversations for the marathon in Doha, Farah said: "Yes, my name will be discussed. I think I have hinted enough. If I am good and capable of getting a medal why not? It suits me and I'm in good shape."
Farah said he has "missed" the frequent racing provided by track competition, compared to the less regular marathons.
"You always start a 1500m at the start of the season, then a 10k, a 5k, a 3k, and I have missed all of that," he added.
"In the marathon you can't afford to do all that and a lot of it is kind of done in training."
'Beating Kipchoge would be amazing'
On Sunday, Farah faces defending champion Eliud Kipchoge. The Kenyan set the world record of 2:01:29 in Berlin in September and is chasing a record fourth win in the men's race at London.
Farah said: "He has shown a different level, going from 2:03 to 2:01.
"The way he runs, you can still learn from him. But when I line up and think can I beat him? I can't be afraid and have to think 'yes I can'.
"If I do beat him it would be an amazing achievement.
"My aim is to win the London Marathon one day. Sometimes you are beaten by a better man and you have to accept that.
"The rivalry is great for the sport - it's one the sport needs."