Fed - first serve and FH approach - what can we learn?

I love how early Federer is onto the shorter ball here in his match against Mischa Zverev last Saturday.  

He sees it so early and makes contact whilst ball is still rising taking time away from his opponent and enabling him to establish fantastic court position to make his split step and cover the volley.  Notice how low and wide his base is on the split step.  Boringly brilliant once again from the maestro.