Louis Oosthuizen and Charl Schwartzel turned in a nine-under 63 in four-ball play to take the lead after the third round of the Zurich Classic of New Orleans. 

The South African duo are 19-under for the tournament and were one of six teams to record a 63, vaulting them past second-round leaders Tony Finau and Cameron Champ by a stroke. 

Australians Marc Leishman and Cameron Smith also shot nine-under and are tied for second with the American pair. 

The top of the leaderboard at TPC Louisiana is crowded, with Bubba Watson and Scottie Scheffler sitting two shots back along with first-round leaders Viktor Hovland and Kris Ventura. 

The tournament, which switched to a team event in 2017, features four-ball in the first and third rounds and foursomes in the second and fourth. 

Three teams are at 16 under and nine more at 15 under, with the latter group including defending champions Jon Rahm and Ryan Palmer. 

The shot of the day belonged to Sam Ryder, who holed a five iron from 206 yards at No. 2 for a double eagle -- the first at the tournament since Rob Oppenheim did it in 2018.