In late 2007, at the Orange Prokom Open in Sopot, Poland, Argüello was embroiled in a betting scandal after his match against world number four Nikolay Davydenko. The match saw Davydenko retire with the scores at 2–6, 6–3, 2–1. Gamblers betting on the match displayed irregular betting patterns and a total of £3.4m was paid out on it, ten times the normal amount for a match at this level. Eventually, Betfair voided all bets on the match. Neither Argüello nor Davydenko have been formally charged with any offence by the ATP.[1]
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