NEW YORK – A surveillance video released by New York police shows former tennis star James Blake being slammed to the ground and handcuffed by an undercover officer. Blake appears to have been caught by surprise as he is casually leaning against a beam outside his hotel, and does not resist arrest, according to the minute-long video released by the NY Police Department Friday. It appears to confirm Blake's account of the rough actions taken by the officer. Blake said he was detained for 15 minutes and that he suspects a ‘racial factor’ was involved in his brief detention. Police denied race was a factor, insisting it was a case of mistaken identity. He vowed to "use my voice to turn this unfortunate incident into a catalyst for change in the relationship between the police and the public they serve."