DUBAI, UNITED ARAB EMIRATES - NOVEMBER 29:  Vladimir Ostroushko of Russia is tackled by Alatasi Tupou of Samoa during the Dubai Sevens match between Samoa and Russia, as part of the second round of the HSBC Sevens World Series at  The Sevens stadium on November 29, 2013 in Dubai, United Arab Emirates.  (Photo by Francois Nel/Getty Images)