I'm not sure why Guest is gloating so much, but he's right that Andy showed quite a bit of variety in his match.
In general, the Ancic Roddick match was much more entertaining than the Agassi Ljubicic match. I didn't enjoy watching their technique as much as I enjoyed watching Ivan's, but the youngsters were hitting harder, more lively, and after Agassi's loss people both Croatia and USA supporters had reason to cheer louder and longer.
From the moment Roddick stepped on the court, he was strutting. I mean strutting strutting. Like a peacock. After their warmup Andy strutted to his chair like John Travolta, as if the Bee Gees were next to him singing Staying Alive, and he flipped his racket in the air, letting it drop on his bag, never stopping as he made his way to Patrick Mac.
Roddick is still pretty one-dimensional, but it looks like his new coach is actually making some productive changes in his game. His slice was very good, especially for a guy with a two-handed backhand. And he's not serving as big, and in general he wasn't serving great, but he seems to be putting more thought into its placement instead of just trying to crank every single first one in.
The thing with Roddick is that you can see the effort in every shot of his game. Every one of his strokes reek of effort, unlike, say, Mario's serve, which looks like a ballet move. He does NOT make the game look easy. But he's very athletic. Watching him play Ancic, you could practically see the intimidation on Mario's face. Roddick isn't smooth, but he's strong, fast, and loves to fight. Andy was strutting. Mario was moping.
Anyway, if I were teaching a player tennis, I wouldn't want him to imitate any of Andy's shots. His volleys are ugly, his backhand is ugly, his serve is ugly, his forehand is not ugly, but definitely not smooth.
But his slice backhand is nice.