Why some players hit winners about 150 km/h and they have the same stats as me I mean 100% in forhand and backhand and 0 topspin ??? I hit normal balls and I have 120-130 and I loose becasue they can hit my ball back I thin that everyone who has 100 in backhand for example should hit with the same power !!! my serve is ok about 200 but rallies not and it's not fair!!!!!!!!!!!!