With a background in baseball, 10-year-old Oliver Keller already has some experience with swinging, making his recent transition to tennis relatively smooth.
Perhaps the biggest adjustment, though, is avoiding the temptation to use his racket like a bat and smashing the ball with all his might, sending it flying out of bounds.
Lesson No. 1 when it comes to transitioning from baseball to tennis: restraint is a virtue.
“When you’re playing baseball, you kind of want to hit it as long as you can,” he said. “In tennis, you kind of want to put some spin on it.”