Wallabies flank David Pocock believes that a good performance on the tour of the UK is exactly what Australia needs to erase the disappointment of their World Cup semifinal exit.

Pocock and the rest of the Wallabies will take on the Barbarians on Saturday before tackling Wales next weekend in Cardiff.

The 23-year-old was one of Australia's star performers at the World Cup and is eager to get back out on the field as soon as possible.

"There was a lot of disappointment after the World Cup with our performance and we've had a couple of weeks to deal with that a bit more and do a bit of training," Pocock told the Sydney Morning Herald.

"Now we've had a good week of training and really looking forward to getting over there.

"As a team we'll change a few little things, but we've got to improve with what we're doing and we've got a few new guys in the squad who've added a bit of energy, and that's been good.

"It's a short tour and we've got to focus on the two games as a team and then we get a rest."

Pocock is wary of the Welsh side that had a very good World Cup and will be motivated to send veteran Shane Williams off on a winning note.

"Wales will be right up for it,'' Pocock said. "It's Shane Williams's last test at the Millennium Stadium and you couldn't get a better place to send off a player who's been magnificent over his career and has been one of the most entertaining players in the world."