Grigor will have some chances vs Andy. However Andy sometimes argues with refs and Grigor loses his focus in such situations. Rememmber the match with DY when he yelled and Grigor lost completely his focus and dropped the set 6-1 losing 6 games in a row.
I hope he learnt how to keep his head cool and shows what he is capable.
This match is on the main stadium court tomorrow from 6pm local time. I'm on holiday so I will get to see it if there's a live feed. Can't wait and I think he has a very good chance of winning this if he serves like he was the last couple of weeks.
This match is being won or lost on Grigor's play. He's either hitting great winners or making stupid mistakes. Roddick is playing smart by pushing the ball back and waiting for an error from Grigor. If he can tighten up his game, he can win this.