The no. of events in sport was 18 . 24 (from 5 confederations) were the number of teams who competed in US Open . 11 from 2 nations were the competitors in US Open . US Open was founded on 1884; 135 years ago (1884) . The official site of US Open is chicagomarathon.com . The venue for US Open was Georgia Dome,New York City, New York,,United States
18 games were held in US Open