You got to hunt for these. But UK bookies like <a href="https://www.bookmakersreview.com/bookmakers/paddy-power">
Paddy Power</a> are good for ongoing promotions. For the French Open <a href="https://www.bookmakersreview.com/bookmakers/paddy-power">Paddy Power</a> is offering money back on outright bets on men's singles matches, if the first set in your selection goes to a tie-break (max bet £100).
Also, have seen <a href="https://www.bookmakersreview.com/bookmakers/bet-victor-victor-chandler">
BetVictor</a> also refund losing bets on men’s single matches if your player loses in a fifth set decider(max bet £50).