The umpire in Arthur's match has the pronunciation of Dzumhur's name all wrong: he seems to be saying "Zoomer" when it should be "Dzum (like the "Dj" in "Djokovic" & a short "u'" sound)-hoor", with the stress on the first syllable.
3-6, 6-2, 6-2 looks great as comebacks go but I still think that Arthur's well below par today. If he was playing like he did at Queens I think he'd have run away with this.