The Los Angeles Lakers do not know how long they will be without LeBron James but expect it to be more than two weeks, according to reports.

James' right foot soreness appeared on the Lakers' injury report on Monday as he was ruled out of Tuesday's game against the Memphis Grizzlies.

That will not be the extent of the 38-year-old's absence, however, having appeared to sustain the injury in the third quarter of Sunday's win over the Dallas Mavericks.

Replays showed there was no contact made with James before he went down.

The Athletic's Shams Charania reported James would miss "an extended period of time", and ESPN's Adrian Wojnarowski added he would be reassessed in a fortnight with the expectation he would not be fit to return.

There are just shy of six weeks remaining of the regular season, of which James is likely to be absent for a significant chunk.

The Lakers are running out of time to rescue their season, improving following the trade deadline but still half a game outside the play-in places.