^I agree on the impact of Ljubicic but I think it's important not to under-estimate the impact of Edberg as well. Stefan began the work on Roger's backhand, in fact he did most of it. And his work on improving Roger's positioning for volleys was invaluable. What I think Ivan has done is help with Roger's mentality. I think the combination of the two has been invaluable for him. Perhaps Ivan was better able to get into Roger's head because the two of them have been close friends for years so that endorses your point about the importance of the coaching relationship