Concentration on any sports arena can be easier said than done with lots of things getting in the way. Concentration can be interrupted by external goings on around the court, by poor play, the scoreline and the antics of your opponent but to name a few. Tennis has a lot of downtime and 80% of your time is spent NOT hitting the ball. The smarter player uses the 20 seconds between points as a weapon rather than a time to rue missed chances or to generally beat oneself up. If you follow the 3 Rs between the points you will improve concentration. STEP 1 - RELEASE. Immediately after the point simply let go and forget about it as it's over (you can briefly internally celebrate any good aspect about the point) STEP 2 - REFLECT. Any aspect that needs fine tuned can be reflected upon and adjustments in tactics can be made for example. Finally, STEP 3 is RE-FOCUS. Re-focus should be engaged just before the next point begins so that you have a clear head and feel relaxed and are ready to watch that ball.