Novak Djokovic's smothering defense worked Tommy Robredo to near exhaustion on this rollicking point.
Feliciano Lopez became the 13th active player to join the 400-win club with his three-set victory over Guillermo Garcia-Lopez in Dubai.
The 20-year-old has no patience for internet trolls.
The new pairing is running hot in 2016.
World No. 1 starts the day juicing then goes downhill fast.
Querrey cracks 10 aces in 7-5, 7-5 win; will face Rajeev Ram in final.
World No. 71 snaps Thiem's eight-match winning streak to reach first ATP final.
