The ITIA said Brooksby had admitted the first and third missed tests, but the tennis player disputed the second error. The tennis player previously told the AP news agency that he has never tested positive or used banned substances.
Missing three doping controls in a 12-month period can result in an anti-doping rule violation. Brooksby has 21 days to appeal to the sports tribunal CAS. Brooksby has not played a tennis match for several months due to two hand operations.