To make mistakes when the opponent has hit a good shot is acceptable, and a good sport would say "nice shot".

To make mistakes, especially by hitting the "tin", when there is no pressure can get to your mind and erode your confidence.  What can be done to regain composure:

• Aim higher on the front wall for the drives.
• Aim higher on the side wall for the boasts from the back corner.
• Don't try to hit outright winners - "a hole in one".
• Keep patient.
• Attack to the corners/nick any shot that sits up.