Marc Leishman and Cameron Smith claimed the Zurich Classic of New Orleans after defeating Louis Oosthuizen and Charl Schwartzel in a play-off.
Leishman and Smith, who carded a final-round 70, won the first play-off hole to trump Oosthuizen and Schwartzel in the race for the title on Sunday.
Australian pair Leishman and Smith and South Africa's Oosthuizen-Schwartzel pairing (71) finished level at 20 under par through 72 holes, a shot clear of Americans Richy Werenski and Peter Uihlein (67).
The final round was the second foursome format of the tournament, after Thursday and Saturday's rounds used alternate-shot play at TPC Louisiana.
The Aussies seal the deal at the @Zurich_Classic.
— PGA TOUR (@PGATOUR) April 25, 2021
Cameron Smith and @MarcLeish are victorious on the first playoff hole. pic.twitter.com/uhtJhBxFvX
Smith and Leishman soared to the top of the leaderboard thanks to 12 holes of flawless golf, which featured four birdies, before three bogeys in five holes allowed Oosthuizen-Schwartzel to join them at the summit.
Leishman's birdie chip at the 16th hole tied the South Africans as the two teams headed for a play-off – the first play-off in the team format of the event since former Masters runner-up Smith and Jonas Blixt prevailed in 2017.
Defending champions Jon Rahm and Ryan Palmer (70) finished 17 under overall, Xander Schauffele-Patrick Cantlay (67) and Henrik Stenson-Justin Rose (70) were two shots further back, while Tony Finau and Cameron Champ crashed down the leaderboard from joint-second to 17th place following their 76.
Schauffele and Cantlay combined for eight birdies and claimed a share of 11th place – tying the record for most par-breakers in a foursomes round at the tournament since it became a team event.