Hi i was just wondering if anyone would bother helping me compile a list of pro service tendancies. an example would be roddick's signature kicker way out wide on the add side. i was having a debate with one of my friends, he said sampras was def more topspin serve than slice serve, i said more slice than topspin, particulary on second serve. topspin happened but not as fequently i felt. am i off the mark?