John Isner: racquet destruction - Australian Open 2015

John Isner smashes his racquet in frustration during his third round match against Gilles Muller at the 2015 Australian Open. Watch more exclusive content at http://www.ausopen.com SUBSCRIBE to the Australian Open YouTube Channel:    / australianopentv   LIKE Australian Open on Facebook:   / australianopen   FOLLOW Australian Open on Twitter:   / australianopen   +1 Australian Open on Google+: https://plus.google.com/+australianopen VISIT: http://www.ausopen.com This is the official YouTube page of the Australian Open.​