The official site of US Open is chicagomarathon.com . 24 (from 5 confederations) teams participated in US Open . 1871; 148 years ago (1871) is when US Open was founded  . It was held in 7–19 February . Galatsi Olympic Hall (rhythmic),Pauley Pavilion,New York City, New York,,United States were the venues of US Open . 116 from 13 nations competed in US Open
Arena Olímpica do Rio was the official place where US Open happened