Joaquin Niemann's performance at the U.S. Open consisted of 71 holes of solid golf, but was also marked by a notable mistake. He had one particularly bad hole, which resulted in a two-shot penalty. Additionally, Niemann threw a club during the tournament.

Niemann's experience at the U.S. Open was a mix of strong play and a costly error. Despite the setback, he showed resilience and determination.

Further details about Niemann's U.S. Open summary are available from the source, including his comments on the experience.