So, of the top 12 ranked, Nadal and Del Potro aren't here and 5 of the other 10 have been beaten in their first match.
Djokovic and Federer have Anderson, Isner and Tsitsipas for L32 company.
Re Sacha Zverev I am one to normally say give it time and it will probably all come together at the top level but this has been a very poor Indian Wells and Miami. He has the ability to be doing very much better.