Updated: Saturday, 12 Oct 2013 20:40 | Comments Leinster's Sean O'Brien scores a try despite Osprey's Tito Tebaldi's efforts Leinster got their quest for a fourth Heineken Cup crown off to a winning start as Sean O'Brien's try helped them battle past the Ospreys at the Liberty Stadium. The British and Irish Lions flanker's try capped an excellent personal display, with fly-half Jimmy Gopperth booting the rest of Leinster's points with four penalties. The Ospreys responded with three penalties from Wales fly-half Dan Biggar, but the hosts lacked the accuracy in attack and edge at the breakdown to overcome a side who have won European silverware in each of the last three seasons. Leinster were without the talismanic presence of Brian O'Driscoll but