Boris Johnson said he was pleased that West Ham has been named the preferred bidder for the Olympic Stadium.
"We have got a first ranked bidder for the stadium. Four good bids came in as everybody knows but the bid that's been ranked top is West Ham United and I'm very pleased about that. If it goes through, it will mean a football legacy for the stadium but it needs to be sorted out."
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Before the final declaration on Friday, the Conservative candidate looked set to lose the City Hall race to Labour's Sadiq Khan.
The Tooting MP has been the frontrunner in the counting process ahead of Tory challenger Zac Goldsmith.
It's not just London where elections have been taking place today. There were council elections taking place across the home counties.