The New Zealand NBA basketball star Steven Adams is in doubt for the opening of the new season.
The Oklahoma City Thunder play champions Golden State in Oakland tomorrow, but could be without Adams because of injury.
Adams has been listed as questionable with lower back soreness.
The centre has had a good preseason, averaging 11 points and 10 rebounds in four games.
The Thunder are definitely without forward Andre Roberson and most likely guard Russell Westbrook.
The Golden State Warriors have won three of the last four NBA titles and are favourites to win it again this season.
OKC were beaten in the first round of the play-offs earlier this year.