Forehand clear or smash is from here to there. Important thing here is this thumb should be between this one and this one.

正手高远及杀球握拍的重点是拇指扣住球拍后位于食指和中指之间，这样才能很稳固的握住球拍。

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For example, for smash or clear, should be changed forehand grip from this usual grip.

在打高远球和杀球时，需要改变握拍姿势为正手握拍。

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Djokovic was starting to dictate with his forehand as he had against Federer and he consolidated the break to move 4-1 clear, only to miss a game point on his next serve and allow Nadal back into it with a heavy backhand on his third break point.

BBC: Rafael Nadal wins US Open to seal career Grand Slam