It should be, but I'm quite frankly having a very difficult time trying to make out how the game progression went in set one from that chart (which is all I'm interested in, to be specific).
Would you be able to help me out with that?
Yeah, it says nothing about what happened until 4-5 in the opening set. I don't remember the games in which there were breaks of serve. I only know that Greul broke first, Seppi broke back and Greul broke again (so at any point of the set there was not more than one break advantage).