Johnson was found guilty in September 2016 of sexually assaulting a 16-year-old girl in the washroom at the former Mynt Nightclub in Windsor in March 2013.
In October 2013, Johnson, who's now 23, was sentenced to three years in prison.
Toronto lawyer James Lockyer represented Johnson in the appeal process.
Among his arguments, Lockyer argued Justice Kirk Munroe made a mistake when he chose to dismiss all of Johnson's evidence at trial.