Thompson (ankle) went to the locker room in the fourth quarter of Monday's game against the Wizards, Will Guillory of The Athletic reports.
Thompson checked out at the 8:11 mark of the fourth quarter and headed to the locker room after grabbing at his right ankle. The Rockets may opt to be cautious with the 23-year-old, and if he doesn't return down the stretch Monday, Reed Sheppard would likely handle point-guard duties, with Dorian Finney-Smith, Aaron Holiday and Josh Okogie serving as reserve reinforcements.