Gamebookers (SBR rating B-), a member of the Partybets family, unfairly grades tennis wager as a loser, taking 63 Pounds ($109) from a player. The player bet on an exact set-score market, wagering Vassallo Arguello to beat Bellucci by 3-0. Bellucci retired midway through the 3rd set with the score at 1 set each. The book's rule states [quote]In the event of a participant withdrawing after the start of a tennis match, the respective bets will be deemed void if at the time of suspension they are still not decided as winning or losing (e.g. First Set and First Set Exacta will be settled if the first set has ended).[/quote] The rule is ambiguous on exact set-scoring with a retirement. Other books have clearer rules on this scenario. From Pinnacle Sports (SBR rating A+): "If a tennis match is not completed because of a player retirement or disqualification, all Set wagers will be considered void. Such wagers will be cancelled and the monies refunded." Under Gamebookers' interpretation, the exact-set betting will have many losing bets, but no winning bets with a retirement. The industry standard is that for any multi-way market, such as exact set-scoring, there must be at least one winning bet.