Originally Posted by spot
I couldn't disagree any more with the advice given so far. The key to beating someone better than you is to make them beat you with what they do the worst. Pound the backhand OVER AND OVER. Don't mix it up- POUND the backhand. Bring them to the net and lob them repeatedly to make them beat you with overheads. Find what they do the worst and keep making them do that every single point. In rec tennis people vary SO MUCH if you compare what they do the best to what they do the worst. Seriously- don't let that player get a single forehand return against you and I guarantee you you will do much better than if you "play your own game".
I agree with the sentiment, but there comes a point where exploiting what the other guy does badly is tough to do. Good players are often good precisely because they know how to hide or avoid their weaknesses.