The other day I played a guy in a semi-serious match who I beat easily in a practice set a few weeks ago. This time around he changed up his strategy. He acknowledged that he couldn't beat me from the baseline because I was really dictating play from back there and so he took advantage of his decent drop shots and net play. He started returning my serves from close to the service line by blocking them with drop shots every chance he could get. So he morphed into a slice and dicer so I was running up to the net on most shots trying to retrieve the low bouncing shots. Obviously I couldn't do much with these with my groundies so I was hitting some weak shots from up there that he could either lob back over me or slice or volley right past me. When serving, I had no choice but to S&V because he would block them back short and low. Really the only thing that saved me was my S&V net play, but it just wasn't enough. He ended up beating me in straight sets (4 and 2). Any ideas on a counter to this type of strategy?