This is a hitting instructor at a little league baseball clinic, take note of the similarities. The baseball coach will highlight very similar characteristics as the tennis coach does in the first clip, you'll hear each make reference to the head, shoulders, elbows and chin, in improving eye contact with either ball. It is a simple muscle memory skill that the more you practice it ...IN PRACTICE...than the easier it'll become and you won't even think about doing it, it'll just happen, during match play. Once attained your consistency and power will greatly increase.
Rafa hitting his two handed backhand. Look at his eyes hold the contact point, and notice his chin and shoulder at this moment of contact. He actually using a similar ball watching trick, as the one you'll read of below. Maybe I'll explain it here sometime in the future.
As you watch below, don't worry about what the pro here says about her age and ability level. Pete Sampras played with this same classic eastern forehand, and it was his weapon of choice in becoming the greatest tennis player ever. To this day no one would deny that Pete's forehand is hit with more pace than either Rafa and Roger Federer's forehands. This is the same Eastern forehand which I teach privately and in groups. You've seen the clip above and the fantastic tip on watching the ball. Now watch this short video clip below and remember how important it is to starting and finishing your forehand in the same place so you can consistently develop your ball watching skills. Hear the catch phrases the pro here uses. Prepare early, this is so important the moment you know which stroke your going to use, it is crucial to then bringing your racquet back and holding it, finish correctly so you don't pull your shoulder, thus eyes away from that contact point mentioned in the short article above. That tip above, on where to hold you eyes upon contact with the ball is just awesome!