Many top professional players use a mental performance coach to help them achieve their goals.  Mental performance training can help players develop skills to become more self-aware, increase their ability to focus,  improve their confidence and resilience, and deal better with stress.  Being mindful at practice by using what a player learns in their sessions with a mental performance coach and doing at least 10 minutes of mental training off-court each day can make a big difference in the development of a player's game.