• London Marathon

Farah: Winning London Marathon would be my greatest feat

Mo Farah ran half the distance of the London Marathon last year © Getty Images

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Double Olympic champion Mo Farah says winning Sunday's London Marathon would be the "greatest thing" he has ever achieved as he admits he is heading into the unknown.

The Briton ran half the course last year to familiarise himself with the demands of running on the streets of London, and believes crossing the finishing line in first place would top everything he has won in his career to date.

"It would be incredible, the greatest thing I've ever achieved, not just in terms of the London Marathon but in terms of the field and the people in it," Farah told the Daily Mail.

"At the London Olympics, I'm sure most believed that if I had a bad day I would finish third or fourth but here we don't know what's going to happen."

But while triumphing on Sunday would be an incredible success for him, the 10,000 metres and 5,000m Olympic champion admits he is heading into new territory.

"The public doesn't quite understand because they're so used to me winning. They just want me to win, but I'm as clueless as everyone else. Yes, I have covered 20 miles and a little bit but I haven't covered the full distance at that pace. The only way to find out is to race," he said.

Farah has been questioned by his rivals ahead of the race after he collapsed at the end of the half marathon in New York on March 16, where he received treatment and was taken away in a wheelchair.

Farah is also aiming to break the British record time run held by Steve Jones for the past 29 years which stands at two hours, seven minutes and 13 seconds.

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