There's the danger of being neither/nor, not that great at either stroke. But once one person does it, you could see a whole flood of players doing it. The idea that it's too hard to master two strokes doesn't make sense. Players have no trouble mastering one handed slice and two handed backhand, if you watch pros in practice they regularly hit with different strokes. Serena Williams will sometimes hit one handers in the warm up, Courier has gone all one handed on some shots.
I don't buy the practice time argument. I would argue that players would probably benefit from learning a new stroke, the same way a basketball player benefits from learning to use off hand or tennis players benefit from playing soccer. Grooving the same strokes over and over may have diminishing returns.
I hope you're right, but I think there some big of caveats that have to be made.
- it's relatively easy to learn and execute a servicable slice. That's why so many rec players rely on it. The same isn't the case for the 2hbh.
- most 2hbh players do have slices, but not great slices. But they don't need to be great slices since it is used primarily as a defensive stroke. Contrast that to using a 2hbh for ROS. It better be a good ROS, otherwise you've defeated the purpose and wasted your time.
- While a 2-hander only needs to learn 2 strokes on that side (2hbh and slice), a 1-hander would have to learn
three strokes: 1hbh drive, 2hbh and slice.
- It makes sense for Courier to use a 1hbh. His 2hbh is basically a 1hbh in terms of: Grip, straight right arm, arm/wrist angle, contact point. So shifting to a 1hbh should be very easy for him. Furthermore, his 2hbh was considered relatively weak, so he's not giving up much.
- I've heard some posters say it's easier for a 2-hander to learn the 1hbh than it is for a 1-hander to learn the 2hbh. I'm not sure if this is true, but it's worth of consideration.
I disagree.. the potential in all areas is imo bigger for the 2hbh.. Best backhands i have ever seen are those from Nalbandian followed by Safin, those are 2 handed backhands. The power those two could generate with their backhand was at least equal to that of a powerful one handed backhand (recent example Wawrinka).
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One thing that should be kept in mind is that Safin is 6'4" and strong, and Nalbandian has a ridiculously broad and bulky chest. He makes Stan look thin by comparison. I'm sure those factors have contributed significantly to their backhands. Gasquet, by comparison, has an unexceptional body, yet can still crush the ball.
Many ATP players who have powerful 2hbhs are tall and/or on the strong side.