ITALY set up a winner takes all clash against Ireland on Sunday after they beat a sterling effort from Eddie O'Sullivan's USA today.
The Italians were made to work hard for their 27-10 bonus-point victory which was only secured in the 65th minute after a penalty try.
Italy captain Sergio Parisse got the first points on the board in the first three minutes, with Mirco Bergamasco converting.
The US hit back after a great run from Paul Emerick and a clever offload to Chris Wyles leveled matters.
Both team swopped penalties before Luciano Orquera went over for Italy after some good pressure forcing Matekitonga Moeakiola to miss the tackle.
They made it 20-10 before half-time through Martin Castrogiovanni after some stour US defending, but another Bergamasco kick swirls wide.
After conceding the penalty try the US played with abandon as the Italians took the foot off the gas.