As long ago as last season his BH rpm rate is #1 on the tour, which allows for high mph without as much risk for error. On serve, I think he starts to leak oil and spray his shots when the serve is off a bit and he gets behind in the rally sequence. On return, he gets more passive to start points with a placement server that knows when and how to jam him enough to neutralize the jump he gets on corner serves. His BH return, when timed right from great instinct, is already top shelf stuff. The FH return still needs more consistency but goes as big as that 2-handed swat when he grooves it. I would like him to start aiming right back at the server’s feet more a la Joe Kovic or Agassi. That would cut the errors down some and often induces a neutral to weak “and one.”