Originally Posted by Lsmkenpo
Switching your stroke between topspin and flat forehand is an old school approach, that is how it was done 25 years ago.
The modern approach I would recommend if you are serious about playing the game at a higher level is to learn the traditional topspin forehand,than
learn to hit the windshield wiper forehand, you can flatten trajectory and still get topspin using the wiper,and offers better control than a traditional flat forehand stroke.
A true flat forehand stroke has become obsolete in my opinion, the windshield wiper is the dominate forehand stroke used in the modern game, allows a player to hit through the ball or loop it and both will have topspin for control.
I see no problem with using WW for rallies and then using a classic shot for winners, or to flatten out for a penetrating shot when you are set up. I think discounting one or the other is stupid. Watch Federer.