I figured if Sam's serve was working well for him, that it would be tough for Robby to beat him on a grass court, and that's pretty much what happened...
In his match against Robby, Sam had, by far, the highest 1st serve percentage of the entire tournament this week, at 84% for the match, and in the 2nd set, Sam had 95% first serves, which is one of the highest 1st serve percentages I've seen all year
The points were relatively short and quick, and Robby just didn't have his best service games in the second set, so once he got broken, it was pretty much over in no time.
Robby shouldn't be too disappointed. Sam played VERY well against him, and although Robby didn't play his best, he did fine in the first set, and just needs to take his chances to attack whenever he plays against a really good server on grass courts. Hopefully, Robby will play someone next who isn't quite as good with their serve