Well, a very closed one at first sight but if we look a litter bit more watchful to the difference between these two players then we'lll see that Philipp Petzschner is just the better player with more experience of important tournaments. There are no doubts that the american can play stable at his serve and could make this one very closed but still I think that these odds represent value on the german man as I have said he has just more time spent on grass courts and not only. Ram's almost success have been proved on hrad courts and on american tournaments without, tournaments which do not a big importance. Anyway Ram didn't lost at least one set still here in wimbledon but once again I have to mentionate he has played against not difficult players and it will going to be very difficult for him to eliminate Philipp Petzschner from the first round as the german man has proved some stable tennis recently in Halle and "s-Hertogenbosh, and only because he has two losses can't change too much the things as he has played his tennis, but just lost against difficult players. Good Luck!