Recordkeeping. To deduct your losses, you must keep an accurate diary or similar record of your gambling winnings and losses and be able to provide receipts, tickets, statements, or other records that show the amount of both your winnings and losses.
bet365 have a range of betting opportunities on player and game stats markets. For the purpose of bet settlement, Opta statistics are used. Opta are a Soccer Statistics provider, widely recognised as world leaders in Sports data provision.