My friend was playing someone at a tournament in a singles match. The opponent did a drop shot and my friend was a little late in reaching it, but he did reach it but he dragged the racquet when he touched the bird a bit. Then the opponent called 'carry', a call I never heard anyone call in my life. He said my friend carried the bird and we argued that it was one continuous stroke and was legal. But he kept blabbing on and on so we just gave him the serve. Was this suppose to be a let? Who's right?