Mr Newlife died in 2009, aged 59, leaving his estate to Oxfam, who now collect £101,840.
William Hill said: "Mr Newlife told had identified Roger Federer as a future serial winner & wanted to place a 'sizeable' long term wager on him.This is one of the most remarkable bets we have ever accepted."
More top news
Simon's Blog - Bird Watching
A British soldier will not be prosecuted over the death of a comrade from West Sussex on an Afghan battlefield four years ago.
Monday night's forecast for the west of the region