David Beckham told a news conference in China: "I'm very proud to be an ambassador and help the game here from the very young ages up to the professional level.
"I'm very proud and thankful for this opportunity and I look forward to being part of this project."
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Mr Blavatnik, whose empire includes the Warner Music Group, has an estimated fortune of £13.17bn according to the Sunday Times Rich List.
Find out what to expect from the weather if you are running in the big race in London or watching from the sidelines.
It will be a soggy start to the weekend and temperatures will drop making it feel colder than in recent days.