Has anyone ever noticed that when you make contact with the ball on the outer edges of the sweetspot, the tendency is to get more spin? My guess would be due to the squares getting larger as you approach the frame.
For topspin, bottom of the racquet upon contact.
For underspin, top of the racquet upon contact.
Almost all of Roger's shots here seem to reflect that.
or this one
For topspin, bottom of the racquet upon contact.
For underspin, top of the racquet upon contact.
Almost all of Roger's shots here seem to reflect that.
or this one