Park continues Rio buildup with CAS decision looming

South Korea's Olympic swimming champion Park Tae-hwan reacts as he answers reporters' questions during a news conference at a hotel in Seoul March 27, 2015. REUTERS/Kim Hong-Ji

(Reuters) - Park Tae-hwan finished fourth in the 200 metres freestyle final at the Brisbane grand prix on Saturday, as the former Olympic champion continues his preparations for the Rio Games despite a controversial doping ban exluding him from the Korean team.

Park, the first Korean to win an Olympic swimming medal when he won 400 freestyle gold in Beijing, completed an 18-month ban imposed by world governing body FINA in March after testing positive for testosterone ahead of the 2014 Asian Games.