Tennis is a lot more technical now. With players like Andy and Djokovic whose return of serve ability was probably unprecedented before them the players with just a big serve aren't really coming close to winning tournaments anymore. Pete Sampras, for example, wouldn't have won many majors if any in the current era. Kevin Anderson is a man who has a serve and not much else and has a record that doesn't say much. He did get the a slam final I think. But with a favourable and depleted draw. Roddick had a lot more to his game.
Andy did really well on Tuesday. I was gutted he couldn't finish the job but he did better than I thought he would. Nick Kyrgios has some serve on him as well and when he's on his game he can trouble the best.