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I also don't think that it is all about the ball... there are a lot of factors and one is talent for sure.
But refering to the ball topic: a lot of people here argue that Harimoto adapted much better to the ABS ball or developed a new table tennis style together with his coaches with respect to the ball. But maybe it was simply that the style he was playing from the very beginning (close to the table, focussed on backhand, taking the ball early) works nicely with the new ball, while others do not. I doubt that Harimoto would play a completely different style with celluloid balls or the early generation of plastic.
But refering to the ball topic: a lot of people here argue that Harimoto adapted much better to the ABS ball or developed a new table tennis style together with his coaches with respect to the ball. But maybe it was simply that the style he was playing from the very beginning (close to the table, focussed on backhand, taking the ball early) works nicely with the new ball, while others do not. I doubt that Harimoto would play a completely different style with celluloid balls or the early generation of plastic.