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Tennis legend John McEnroe is on TODAY giving his take on the upcoming U.S. Open, as well as Naomi Osaka and the current mental health push in sports. He also talks about his career and his latest voiceover work. » Subscribe to TODAY: http://on.today.com/SubscribeToTODAY » Watch the latest from TODAY: http://bit.ly/LatestTODAY About: TODAY brings you