Nathan Sobey will not play in his team's game against Adelaide on Sunday.
His team, the Phoenix, confirmed on Saturday through social media that Sobey would miss the game due to illness.
Sobey, aged 35, has been averaging 22.8 points per game in NBL26, scoring at least 24 points in his last five games.
His absence is significant for the second-placed Phoenix, who are currently three games behind the 36ers, who lead the ladder.
The game between Adelaide and South East Melbourne is scheduled for Sunday at 2:30 PM AEDT and will be broadcast live on ESPN and 10.