I asked my coach to dedicate one month to fundamentals only. He created a program for me that mostly consists of hand-feeding different type of balls for me - short, long, wide. I split step, he feeds the ball, I move, hit, go back. We also do rapid succession of 4-5 different balls. My footwork, kinetic chain and contact point are improving, however the quality and timing of my split step, unit turn and ball recognition are not.
Big question - what can we do to gain early ball recognition, better splitstep timing, explosive early unit turn and first step to the ball?
Two things regarding current method:
1. Your coach will always feed the ball with a timing comfortable for you - he waits for you, then feeds the ball. That's not the case when you play real rallies.
2. If you split step before coach feeds the ball, then you can't split step properly. The whole concept of split step is to be in the air when opponent hits the ball. When you land, you already recognize the direction and you're able to move your body towards the ball.
Four things happen during split step:
1. You make a little jump just before opponent hits the ball
2. Your eye focuses on the ball
3. Your brain recognizes the direction of the ball until you land
4. You start to turn the upper body and move towards the ball right when you land on both feet
First thing I would change is the way you do the current drills - the coach could feed balls from the racquet. Then you have clear visual on the ball and racquet, you can time your split step properly, so you will be in the air when the ball leaves coaches racquet.
What helps a lot with learning split step is rhythm. When I was a kid my coach taught me a drill:
1. Your coach stands on the other side of the court around the service line and turns up a metronome or other kind or a song with a clear rhythm that you both can hear.
2. He feeds you the ball according to the rhythm - every "x" beats. Important thing is that the ball is fed after the bounce - coach drops the ball for the bounce and then hits. This gives you time to focus on the ball and time the split step.
3. Coach feeds the ball with a pace that is OK or even challenging for you but the balls are fed on a comfortable distance (three steps to the ball are enough) -> this way the emphasis is on early preparation, not on movement per se. Also the time between the balls is long enough for you to get back to the middle and focus on next ball. (but everything in the rhythm!)
4. You focus on timing the split step properly and preparing as fast as possible. The rhythm will help with timing the split step and coordinating your feet.
What is hard about the split step is the timing when you should start this small "jump". With rhythm/ music it's easier to learn this timing. Also the focus is not to make you tired but to feed you fast balls that are a bit challenging for you. This way you have to focus on fast preparation (unit turn, first step, etc.)