Top stuff, J-I.
Made life difficult for himself by dropping the opening set, but you felt that if he could keep Querrey out there long enough he would get a chance to turn it around. Couldn't watch the match, but it sounds like Querrey's level dropped in the 3rd set (certainly mentally), most probably feeling it after the long match with Odesnik yesterday.
Chela now needs barely 100pts over the remainder of the season to seal a year-end top 100 finish...assuming he stays fit that is a formality. It will be interesting to see how much higher he can go (I'd estimate on the boundary of top 50).