Benetton took advantage of Murray Koster’s red card to snatch a 25-24 victory over the Sharks which keeps alive their hopes of a United Rugby Championship play-off place.
Glasgow Warriors strengthened their hold on second place in the BKT United Rugby Championship with a 21-10 win against the Hollywoodbets Sharks.
The Sharks and the Ospreys meet in a historic match at the Twickenham Stoop on Friday night, as it will be the first time a United Rugby Championship match has ever taken place in England.
Club teams normally have to wait twelve years for a second crack at the Lions but the Sharks are now set to play them twice in four days.