Truls' post-match statement - he compliments Haug, says he would have lost regardless of that service fault call... At first hand, it's a very respectful comment, admirable sportsmanship... TERRIBLE mentality for an elite athlete, though (if he honestly meant it). Especially considering the momentum was in his favor.
So he's back from 0-3, it's 2-3 now, he leads 2-1 in game six and the umpire faults his serve... He flips the F out, throws a tantrum and loses six points in a row, costing him the match...
Not the first time this has happened to him and it clearly shows he was mentally in a bad place all along. From personal experience, I'd say external factors that kept him from fully immersing himself into the match. Which factors... None of my business, or anyone else's, tbh.
Just an observation.