"His groundstrokes are too straight" - Mischa Zverev on Andy Murray

Mischa Zverev feels that Andy Murray's slow comeback is due to him unable to add punch to his groundstrokes.

The German knows Murray well having played against him and observed him many times on the court. Murray has achieved tremendous things considering the fact that he's playing with a metal hip but Zverev feels he could have done much better if he had more punch in his groundstrokes:

“Murray can’t accelerate. That sounds strange for a player of his class, but he doesn’t have the train in his arms like Rafa or Federer or even a Jack Sock. I had played Rafa in Brisbane the week before and lost one and one. No chance. He could pass me 19 different ways."

While for Murray's that something he can't do because his groundstrokes are too straight:

“I couldn’t read his punches. They were too fast and also had topspin, so I sometimes had the feeling that he was flying to the tarpaulin. But he still fell in the back. Murray’s forehand and backhand are relatively straight.”