I disagree that a majority would. Most people on this board would acknowledge that his serve is below Karlovic, Isner, Raonic, Muller et al. Those guys and a few others have superior serves. Dimitrov absolutely does not, I don't think that's even a viable comparison considering how one-dimensional his serve is and how it lags behind Federer's in all relevant service statistics (even ones isolating the serve), and Cilic's is a tad below as well. As for versatility on the forehand, I agree. But from the baseline, I have to disagree — Del Potro can literally be like a wall from the baseline slapping forehands. Well we'll just have to agree to disagree here, even though I do think your assessment is wildly off. I've seen Delpo's forehand break down a fair many times, more often than Federer's. I think his best matches distort your perception here. On the volleys, I agree with most of what you said... except Karlovic deals with low balls very well (not just for his height). Whether this be on half volleys or very low volleys — he deals with them as good as anyone, and has excellent touch. Obviously on the low volleys, not as good as Federer, but Fed is definitely not out of his league by a considerable amount in that department. Where Federer will excel better here is when the ball gets to that extremely low, nearly going behind you, type of ball. Where since Karlovic stands so upright (while this is a technical flaw, he makes do with it), getting control on those types of balls, like you said, with his height, is very difficult. Disagree, Karlovic is indeed below average on low balls whereas Federer is one of the best on tour at handling them. Closes down the net way faster when he s + v's, has more dexterity, better reflexes and a better first volley. Other than his imposing physical stature I can't think of a single advantage Ivo has here.