Two tries from centre Ashley Beck and one for Paul James were the fruits of Biggar's trickery and tactical nous in the first 50 minutes as he squeezed the life out of the Italians.

Apart from an interlude in the second half when Treviso scored a terrific try through Ludovico Nitoglia, the Ospreys played with the swagger of a team who had ended Leinster's 20-game unbeaten run in their last match adding further tries through Joe Bearman and Tom Isaacs.

Biggar knocked over a penalty after 10 minutes and followed it up with a delightful piece of back play to create a try for inside-centre Beck.

Biggar hoisted an enormous Garryowen on to Treviso winger Tommaso Benvenuti but the ball never arrived as Biggar sprinted forward and out-jumped the Italian, collecting the ball in the process. On coming back to earth he passed onto to wing Hanno Dirksen who fed Beck inside him for a great score.

Biggar converted and then chipped in with a penalty to put the Ospreys firmly in control at 13-3.

With the half-hour mark approaching prop Adam Jones, making his first home appearance for his region since helping Wales to the Grand Slam, popped up at scrum-half and charged for the line. He off-loaded to front-row partner James who barrelled over. Biggar's conversion made the score 20-3 and it stayed that until half-time.

Immediately after the break Beck had his second when a Shane Williams pass gave him the space to dummy and cut inside Kris Burton, Biggar again converting.

In the 55^th minute Treviso showed attacking brilliance to get a converted try back. Scrum-half Edoardo Gori launched an attack from inside his 22 and when the Ospreys did bring the Italians' attack to a halt, Gori brought the ball right and wing Nitoglia stepped inside the cover defence to score. Alberto Di Bernardo added the afters.

When Tommaso Benvenuti got sin binned for a deliberate knock-on ten minutes from time, the Ospreys turned the screw.

First No. 8 Bearman went over from a five-metre scrum for the bonus-point try and then replacement wing Isaacs danced down the touchline after a trademark break from Williams, making a surprise appearance for the Ospreys. Biggar converted to end the match with a personal haul of 16 points.