[scoundrel1728]

If you are going to do that, do it soon and get in some practice using it with a tennis-playing friend at your local tennis court. To use a digital camera effectively, you must learn the half-press - pressing your shutter release down halfway to lock in the focus and exposure, then pressing the shutter the rest of the way when ready to shoot. You must also learn to compensate for the delay between the live action and that displayed in the electronic viewfinder, plus the delay between pressing the shutter release and actually taking the picture.

Sports photography can make as great a demand on the photographer's timing and reflexes as on those of the athletes themselves. While your friend is practicing his serve or ball return, you can practice shooting the exact moment ball meets racket. It will be easier to judge your success at this if you can shoot at an angle that the ball moves across the field of view rather than toward or away from you.