Chicago Bulls will be without key man guard Zach LaVine for up to four weeks.

The Bulls, who have recently changed coaches with Jim Boylen replacing the axed Fred Hoiberg, will be without the guard for between two and four weeks as he recovers from a sprained ankle.

The 23-year-old is in his second season with Chicago after three years at Minnesota Timberwolves and is enjoying his best campaign to date – despite the Bulls’ struggles.

LaVine is averaging 23.8 points, 4.9 rebounds and 4.8 assists per game – all of which are career highs – but now faces a stint on the sidelines.

“We’ve gotten all the information we need to,” Boylen told reporters.

“We feel safe saying that’s kind of where it’s at.” LaVine sustained the injury during the loss against Orlando Magic and has missed three games since.

The Bulls are 2-6 since Boylen took charge and have an overall record of 7-25 – the worst in the NBA. Chicago are back in action on Friday night when they entertain Orlando.

Meanwhile, Miami Heat need to rediscover their form if they are to mount a serious playoff bid and they are in action against an improving Houston Rockets on Thursday.

The Rockets endured a mixed start to the season but head to Florida seeking a sixth straight win and are 1.83 with a -2.5 handicap or 1.61 to win. Miami are 2.38 to come out on top.