Nineteen-year-old winger Jordan Petaia made a sensational debut for Australia at the Rugby World Cup on Saturday, scoring a try and creating another in a 45-10 win over Uruguay.

Outside center Tevita Kuridrani made his own push for further selection, scoring a brace of tries after coming into the Pool D clash at Oita Stadium as one of 12 changes to the Australian starting XV.

Former Toyota Industries Shuttles utility back Dane Haylett-Petty also bagged a pair of tries in his second straight start following the Wallabies' 29-25 loss to Wales six days ago.

The world No. 6 side did not have it all their way, however, as they allowed the unfancied Uruguayans to stick around in the first half through a combination of mistakes and poor discipline.

(Jordan Petaia of Australia scores a try.)

But the men in green and gold put their feet down after the interval, securing the bonus point with Kuridrani's second try in the 45th minute, one of four second-half five-pointers.

Following some outstanding attacking play from his backs, Wallabies coach Michael Cheika will have some tough selection choices to make further down the line in the tournament.

Fullback Kurtley Beale was instrumental in Australia's opening try, first charging down a kick near the Uruguayan line, then setting up Haylett-Petty in the right corner after the Wallabies regathered the ball in broken play.

The young Teros were not deterred, attacking the Wallabies try-line for a sustained stretch and getting on the board through the boot of flyhalf Felipe Berchesi after Australian captain Michael Hooper was penalized for a high tackle.

(Manuel Ardao (C) of Uruguay passes the ball.)

The Wallabies -- sporting their alternate strip with an Indigenous Australian design -- were soon reduced to 14 men when Adam Coleman went to the sin bin for their second high shot in quick succession.

Petaia, the Wallabies' youngest-ever World Cup player, sent a roar through the largely pro-Australian crowd in the 23rd minute when he became the country's youngest World Cup try scorer.

With referee Mathieu Raynal playing advantage to the Wallabies deep inside Uruguayan territory, the left winger received an inside pass from Beale and pivoted past a tackler to score.

The South Americans gained a two-man advantage in the 27th minute when No. 8 Lukhan Salakaia-Loto was sent to the bin for another high tackle.

Petaia created the opening for man-of-the-match Kuridrani's first try in the 30th minute, jinking back inside from the left before putting the center through the gap.

(Lukhan Salakaia-Loto runs with the ball.)

With Christian Lealiifano adding the extras, Australia took a 19-3 lead into halftime.

Cheika used six of his eight possible replacements in the second half, taking off Petaia at halftime and replacing scrumhalf Nic White with Will Genia 10 minutes later.

Kuridrani turned on the afterburners to score his second early in the second half, scorching his way through the Uruguayan line.

The Fijian-born speedster said the Wallabies found success in the second half with a more direct approach, attacking the line before pushing the ball wider.

"It was a bit rusty in the first half, but we went out of the change room in the second half and we stuck to the basics. We came out in the second half and got the job done," he said.

Veteran prop James Slipper earned a huge cheer from his teammates in the 60th minute when he stretched the lead to 38-3 with his maiden test try.

(Kurtley Beale of Australia is tackled by a Uruguay player.)

Playing his 94th test, the 30-year-old had more caps than any player at the 2019 World Cup without a test try to his name.

To their credit, the youthful Uruguayans kept up the fight despite the huge deficit.

With Manuel Diana leading the way, they fought their way through a succession of phases on the Australian line before the No. 8 picked up the ball and crossed the line in the 77th minute.

A delighted Uruguay coach Esteban Meneses lauded his inexperienced team, made up largely of semi-professionals, for taking the fight to the two-time world champions until the very end.

"For us it's incredible, the players left everything (out there). Congratulations for the players from Uruguay, it's fantastic," the Argentine said.