Jo could have won the first set. Had so many break points and double faulted at 5-6 in the TB. Thiemo has been serving big. Jo then took a medical time out for a back problem.
Movement looked to be affected for sometime. Then I guess it loosened up because he's moving better now.
Jo got an early break in the 3rd set and went up 3-0, but then got broken again and now it's 3-all.
He's playing like usual. LOTS of winners and LOTS of errors.
EDIT: He was also clutching his left wrist at one point early in the first set.
Looks physically comfortable for now.