As an old guy, it's interesting for me to see the wailing and knashing of teeth regarding the use of slice. Moses didn't come down the mountain with instructions from God that a tennis ball must be hit a certain way. When I was younger, hitting the ball with slice or perflectly flat like Connors was a perfectly acceptable way to hit the ball. In fact, given the fact that the racket had only about 65 square inches of string area, it was far safer to hit flat or with slice because you were likely to shank a heavy topspin shot. Now everyone thinks you can't be a good tennis player unless you hit looping topspin. I slice a lot of forehands. I'll hit a high slice to give myself time to recover when I'm pulled off wide. I'll hit a low slice approach shot to limit my opponent's options. One of my favorite shots is a deep slice lob to my opponent's backhand because it forces him to generate pace off the backhand wing and a lot of folks can't do that. The best way to hit a tennis ball is the way that wins you the point. If that's a "push," or a slice, or a topspin shot, that's fine. If Federer knew he could beat Djokovic by using a slice forehand, don't you think he'd do it? Heck, if he thought that would work, he'd be practicing slice forehands 8 hours a day. If I hit a shot and I notice that it gives my opponent trouble, I'm probably going to hit that shot again in the future, even if it's what some would consider an "ugly" shot, like a lob or a low slice.