After you watch the ball come into your racket, try to look at your opponent's racket instead of tracking the path of your shot. Remember, you cannot make line calls on your opponent's side of the net. So, what good does it do to watch the path of your shot? Instead, assume that your shot is in, (which will help your confidence), and also assume that your opponent will return your shot. If you trust these assumptions, then by watching your opponent's racket, you might gain some information of what type of shot your opponent might hit.
For example, when your opponent is on the baseline, the racket pulled straight back might be a drive, the racket dropping down might be a lob and the racket setting up high might be a chip or short ball. When your opponent is at the net, the racket going down might be a good time to move in, the racket mid height might mean for you to hold your position and the racket cocking up might mean an overhead so move back and defend.
Regardless, watching the ball when it comes to you and watching your opponent's racket will teach you not to make the match so personal. Avoid making eye contact with your opponent; do not even look at what they are wearing. The only important thing to watch is their racket. Also, do not watch your partner hit the ball. First of all, you might get hit in the face and secondly, by the time you turn around your opponents will target you because you gained no information about your opponents' next shots. Try this, you'll like it!
Good luck on the courts!