Serena Williams and Sloane Stephens battled it out for a berth in the Aussie Open semi-finals, and during the third set Serena got a bit frustrated. Check out how she demolishes her racquet, and by destroy we mean, really destroy. The 19 year-old Sloane Stephens upset Serena 3-6, 7-5, and 6-4 to advance to the semi-finals of the Aussie Open.
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