Rio de Janeiro (dpa) - Banned swimmer Nikita Lobintsev is so confident of being able to compete at the Rio Olympics that he has been pictured wearing the official Russian Games uniform.Lobintsev and fellow swimmer Vladimir Morozov became the first athletes on Saturday to take their cases to the ad-hoc Rio division of the Court of Arbitration for Sport, which has been set up especially for the August 5-21 Games.Lobintsev, 27, appeared on his Instagram account donning the official Russian Olympic uniform.