@martinblackman_usta on @samquerrey ahead of Wimbledon QF vs. #Murray today: "I'm amazed at Sam's ability to play free on the big points and at how well he is moving. Sam looks laid back and relaxed in his matches, which is who he is but there is a fire inside that's burning bright and he will bring it today against Murray." #USTennis #querrey #Wimbledon #instatennis #instasport #martinblackman #tennis #sportsday