If you struggle to maintain your balance on court and often end up cross-legged on the floor like Bambi, clock face lunges could be the answer to your prayers.
As this excellent instructional video from Intosport shows, completing a range of different lunges (forwards, backwards and side) can improve your stability, agility, footwork and, most importantly, ability to reach those just-out-of-reach balls. Once mastered, the clock face lunge should become an integral part of your warm-up routine.
https://www.youtube.com/watch?v=NRoeQfv_cAM