Treviso have shocked Perpignan in Munster's Pool One. The Italians holding on for a 9-8 win. Last year's beaten semi-finalists Cardiff Blues have heaped more misery on Harlequins with a 20 points to 6 win at Arms Park. Substitute Leigh Halfpenny scored a last minute try to seal the win for the Blues. Stade Francais top Ulster's Pool Four. The French Top-14 giants have hammered Edinburgh 31-7 in the French capital.