The South African will make his first U.S. Open start after leading the 2021 Sunshine Tour's Order of Merit. He turned professional in 2019 after representing his home country in the 2018 World Amateur Team Championship. Nienaber just registered his first professional victory on May 9 at the Dimension Data Pro-Am, a Sunshine Tour event that is also co-sanctioned by the European Challenge Tour. He beat Henric Sturehed in a playoff. In 2019, he captured the South African Amateur.
|2021||Torrey Pines Golf Course (South Course)||72-74-80-72--282||+14||T-68|