I had the pleasure to watch end of second set and third set. At 4-4 in second set, things were looking tight and grim, but Gulbis very obligingly broke himself
and took the match to a decider. From then on, I could see Jo's determination to assert himself, and he did just that. Well done!
I must say I was impressed with Jo in that match. He was returning well, even off Gulbis' big first serves, and that shows that he's working to improve that aspect of his game. It was obvious that his right upper arm was bothering him (you could see the taping) but this did not deter him from hitting huge first serves and going for his shots. He went to the net with great effect, and his athleticism, as always, was a joy to watch.
The lower half of the draw is the more challenging - if he can get past winner of Wawrinka/Monfils in semis, he has a great chance of winning this tournament. Hope that the arm would not be an issue, or at least he can find a way to work through the pain without inflicting further damage. Good luck, Jo!