Can Canadian tennis star Vasek Pospisil hit a home run? Can softball star Haylie McCleney return a pro tennis serve? How far can they both hit a ball? Two world-class Olympians take the challenge to swap sports with surprising results: http://bit.do/SportsSwapEN Subscribe to the official Olympic channel here: http://bit.ly/1dn6AV5 Visit the Olympic Channel, where the Games never end: http://www.olympicchannel.com

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