Mo Farah to be 'quite emotional' in final London Marathon

Would Mo Farah rather win the marathon or see Arsenal win the league? (1:12)

Mo Farah speaks ahead of what he promises will be his last ever London Marathon. (1:12)

Mo Farah will compete in his final marathon in front of a home crowd in London on Sunday, the four-time Olympic gold medalist said Thursday ahead of his likely retirement later this year.

The 40-year-old Farah, who withdrew from last year's race due to injury, has run the London Marathon three times with a best finish of third in 2018, the same year he won the Chicago Marathon.

About 750,000 people are expected to attend the marathon, and Farah expects the occasion to be an emotional one.

"It will be my last marathon. It won't be my last race, but in terms of marathon, the London Marathon will be my last," Farah told reporters. "I started the mini-marathon here, so for me, it will be quite emotional. I remember [when I was] 14 years old, I was here watching great athletes running on the Sunday and I was here taking part in the mini-marathon.

"The support, the people coming out in London, I think that will get to me, but I will try not think about it and run. After the race, maybe there might be a bit of tears and emotion."