Complex sentence: He hits with a large amount of spin, as seen on his forehand and second serve, as they kick a great deal, especially on the second serve, allowing him to hit very heavy shots and control the point.
Split into simpler sentences: He hits with a large amount of spin, as seen on his forehand and second serve. His shots kick a great deal, especially on the second serve, allowing him to hit very heavy rallies and control the point.