Vainikolo made his England debut during the Six Nations Getty Images)

Gloucester wing Lesley Vainikolo says he believes Munster are favourites to win the Heineken Cup quarter-final at Kingsholm on Saturday.

The England international also told BBC Radio Gloucestershire that Saturday's defeat at Worcester was a wake-up call.

"It hurts, but now we need to stay positive," said Vainikolo. "We're looking forward to it, but it's an 80 minute game, not 40 or 50."

"We'll keep it low key, stay as a team, and see what happens."

Munster have lost on both their previous visits to Kingsholm, but the Irish province are currently ranked number one under the new seeding system that the European Rugby Cup will apply from next season.