Houston Rockets guard Eric Gordon is feared to be lost for one-to-two weeks with a left ankle injury suffered in a scrimmage on Tuesday, sources tell ESPN's Adrian Wojnarowski.

The Rockets are expected to have a clearer sense of Gordon's injury timeline once it's evaluated again on Wednesday, sources said.

X-Rays were negative on the ankle, coach Mike D'Antoni said.

"It hurts," D'Antoni added after Houston's 137-112 scrimmage victory over the Boston Celtics.

Gordon, 31, jumped to make a pass and landed awkwardly on his left foot in the second quarter, twisting his ankle as he did so, with 1:08 remaining.

After staying down for an extended period of time, Gordon was slowly helped off the court with the assistance of a pair of teammates, putting very little weight on his left foot as he did so. Shortly thereafter, Houston ruled Gordon out for the remainder of the game.

"Of course Eric is a huge part of what we're doing and what we're trying to do," Rockets star James Harden said. "Hopefully he can get his ankle healed as soon as possible, but just like we've dealt with adversity all year it's about having guys step up."

It's been a difficult season for Gordon, who signed a four-year, $76 million contract extension with the Rockets back in September. He missed six weeks after undergoing arthroscopic surgery on his right knee Nov. 13 and scored just 14.5 points per game -- his lowest average in his four seasons with the Rockets -- while shooting a career-low 37% from the field and 31.9% from 3-point range.

The Rockets went into the NBA bubble hoping Gordon had been able to use the hiatus after the season was suspended in March to get his body right, allowing him to become Houston's third scoring option behind superstars James Harden and Russell Westbrook. Gordon's importance has only grown given Houston's decision to lean all the way into playing with small lineups, with their typical starting lineup featuring no one taller than 6-foot-7 and with P.J. Tucker operating at center.

D'Antoni said he was unsure of how he could replace Gordon in the starting lineup if he was forced to miss Friday's opening seeding game against the Dallas Mavericks. He started Ben McLemore in the second half Tuesday but said he could also start Danuel House.

"We'll see," D'Antoni said. "It's an easier rotation, because Danuel has to back up Covington at the four, but Danuel could probably start. We'll see what happens."