OKLAHOMA CITY — In the aftermath of their worst loss of the season, few Lakers players or coaches had spoken to Luka Doncic after he limped off the court in the third quarter Thursday against the Oklahoma City Thunder. Austin Reaves didn’t know the extent of Doncic’s hamstring injury, but he knew how the Lakers superstar would approach the latest hurdle in this winding season.

“He’s a competitor,” Reaves said of Doncic, “so he’ll do all he can do to put himself in a position to come back when he can.”

Doncic will undergo an MRI on Friday on the left hamstring injury he suffered in a 43-point loss to the Thunder. He already missed four games before the All-Star break with the same injury, but the Lakers withheld expectations on his status for the final five regular-season games.

After Sunday’s game in Dallas, the Lakers face the Thunder at home Tuesday, play consecutive games at Golden State on Thursday and against Phoenix at home Friday and finish the regular season April 12 against Utah.

Doncic’s injury left the Lakers backcourt extra shorthanded Thursday as Marcus Smart missed his sixth consecutive game Thursday. The veteran guard could return against Dallas, coach JJ Redick said. He has been day-to-day since injuring his right ankle against Orlando on March 21.

If Smart is unable to return in Doncic’s absence, the Lakers could shift even more ball-handling responsibility to Reaves and LeBron James while relying on Bronny James as an additional guard off the bench. The 21-year-old James has played in five consecutive games, tying his longest stretch of his second pro season.

The Lakers (50-27) are already guaranteed a top-six seed in the Western Conference, but are still jostling for seeding. They have a one-game lead for the No. 3 seed over No. 4 Denver, which is on a seven-game winning streak.

Approaching the end of the regular season, the Lakers looked at Thursday’s game against the defending NBA champions as a test, forward Jake LaRavia said. They were 15-2 in March with 13 wins in their last 14 games. The Lakers were playing like an evolved form of the team that lost by 29 to the Thunder in Oklahoma City in November.

But like that first rout, Thursday’s featured a flurry of Lakers turnovers, suffocating Oklahoma City ball pressure and an efficient masterclass from Shai Gilgeous-Alexander.

“This close to the end of the season, we would’ve wanted it not to go that way,” said LaRavia, who had six points and a team-high eight rebounds Thursday. “It was pretty much the same story, I feel like, the first time we played here this year.”

The Lakers built much of their March success on successful revenge performances. They bounced back after previous losses to the New York Knicks, Houston Rockets and the Orlando Magic. They lost by seven to the Nuggets on March 5 then responded with nine consecutive wins, their longest winning streak of the season, including an overtime thriller against Denver that clinched the head-to-head tiebreaker that could factor into the tight standings.

Redick praised his team’s “playoff mentality” during the run. It was also when the team was largely its healthiest.

Doncic had played all but one game since the All-Star break. Reaves, who missed six weeks with a calf injury this season, has started in 22 consecutive games. When James returned from an elbow injury, the star trio found a clear hierarchy that lifted the team to new heights.

Doncic, who became just the 10th player in NBA history to score 600 points in a single month, is the “head of the snake,” said James, who is averaging just 12.3 shots in the last 12 games but is shooting 54.4% from the field. Doncic’s brilliant March unified the team behind his most valuable player push, his thrilling shot-making and even his smiling dunk against Washington.

With the team exuding the type of joy that often characterizes Doncic’s game, James believes the Lakers can maintain their momentum despite Doncic’s uncertain status and a deflating loss.

“Nothing is rattled,” James said. “It’s one game, it’s part of the NBA season, it’s the defending champions. We get it. We understand.”