LeBron James is bullish that he will be fine for the Los Angeles Lakers' next game on Thursday despite an injury scare in Tuesday's 108-90 loss to the Phoenix Suns.

James went down writhing in pain in the third quarter after landing awkwardly on his left ankle when driving to the basket.

The 36-year-old, who has had ankle issues this season, punched the floor at the time, but eventually got up to play on, finishing with 34 points and seven rebounds.

The four-time MVP was benched late but was confident he would be fine to play the San Antonio Spurs on Thursday, brushing off questions about the ankle concern.

"I stepped on Jae Crowder's foot," James snapped at the post-game news conference when asked about what happened.

When pressed on the severity of the injury, he added: "Yeah, I'll be ready for the next game."

James clearly was not in a mood to discuss the concern as the Lakers' frustrating season continued, slipping to a 16-16 record after being dispatched by the Western Conference leaders.

The Suns and the Golden State Warriors continue to streak ahead in the west, boasting 25-5 and 25-6 records respectively.

"The Western Conference has got some really good teams right now, obviously Phoenix and Golden State are playing extremely good basketball," James added.

"For the majority of the season they've been extremely healthy. That definitely helps in terms of their chemistry."

The defeat comes with Anthony Davis sidelined with a knee injury for the next four weeks and leaves James uncertain about their status as genuine title contenders.

"I feel like that's a question I ask myself after every game," James said when asked if the Lakers were only good on paper rather than reality. "I don’t know, I don’t think so.

"We don’t know. We have no idea what this team could be. We haven’t been whole. February was the last time we played the same starting lineup or had the same rotation off the bench, it's been a long time so it's hard to assess that."