On a course that gave nothing away and punished bad shots, Louis Oosthuizen made six birdies on Sunday on his way to a three-under-par 69 and a share of sixth place in the World Golf Championships-Workday Championship at The Concession in Florida.

After missing the green with his approach on two, and paying the price with a two-putt bogey, he made birdie on the par-five third with a 23-foot putt after laying up. Birdies on 10 and 11 came from his approach accuracy. But he was not so accurate after laying up again on the par-five 13th, and he missed an 11-footer for par. He missed the green on the par-three 14th, and again was unable to get up and down for par. But he picked up birdies on 16 and 17 – on 16 with accuracy in to the green leaving him a three-footer for birdie, and on 17, he made a 21-footer for birdie.

Morikawa shot a final-round 69 to beat Brooks Koepka (70), Billy Horschel (70) and Viktor Hovland (67) by three.

Christiaan Bezuidenhout finished well with a two-under 70 lifting him to a share of 32nd in the 72-man field, while Erik van Rooyen was even better with his four-under 68 boosting him to 37th. Brandon Stone made a one-under 71 to finish 44th.

Not so fortunate were JC Ritchie and Daniel van Tonder who carded 78 and 79 respectively to finish 68th and 71st.

Together with Oosthuizen in sixth were Rory McIlroy and Webb Simpson, while world number one Dustin Johnson had an uncharacteristically bad week as his closing 78 saw him finish in a share of 54th.