OXFAM could make as much as £330,000 after a Kidlington man left a series of betting slips to the charity in his will.
Nicholas Newlife placed the bets with bookmakers William Hill between 2000 and 2005.
The charity has already received £16,750 from his generosity, with a £250 bet on Roger Federer to win at least 14 grand slam titles before 2020 coming good when he won the French Open last year.
Another single bet, £1,520 on Federer to win seven Wimbledon men's singles titles before 2020, could pay out more than £100,000 this summer if the Swiss wins the tournament.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here