I recently played at 18+ 3.5 Men's Nationals in Orlando, where the courts were equipped with PlaySight cameras. Here is 18 minutes of footage (first four games, plus second set TB) of a match between me (wearing all black; TennisRecord* rating of 3.45 before the match) and my partner (gray shorts; 3.34) vs. a 3.93 (wearing all white)/3.29 (wearing black shorts) pair. It was some ugly tennis on my part, lots of lobbing and slicing and dinking. But we won 6-2, 7-6. Evidently that's good enough to win at 3.5 Nationals, ha.
* I'm not affiliated with this site and make no warranties as to it's accuracy (I trust @schmke's rating estimates way more)
* I'm not affiliated with this site and make no warranties as to it's accuracy (I trust @schmke's rating estimates way more)