To get the very best value on offer you need to have a selection of bookmaker accounts. For tennis betting we recommend Net Bet, 10Bet, Bet365, William Hill, Boylesports, Betway and BetVictor in particular - as they all use the 'Bet Void' rule. If you place a Match Winner bet with those bookies and your player gets injured or retires in the match, you will get your stake back. Find out more about tennis betting rules here.