I get you..I find the IBM stats interesting but ultimately agree with you, they seem so arbirtrary and sometimes obvious: If Murray converts 80% of his BP chances, he wins 70% of the time. OK..cool?
However as a basketball fan I don't see why things like Average Winners Per Match or Average Aces Per Match aren't shown. "Murray averages 5.5 aces and he's got 7 in the second set! He's serving out of his mind!"
Most tennis fans don't seem that interested in stats though. Oh well