It seems like the Cleveland Cavaliers will have to advance in their campaign without its star player as LeBron James won't be playing for two weeks for the team because of injuries in his left knee and lower back.

The Cavaliers announced in a press release this Thursday that multiple tests has been done on James, including an MRI and radiographs, to reveal that the superstar has knee and back strains.

The tests were taken Wednesday before the Cavs suffered a loss, their third straight, against Milwaukee Bucks. The four-time NBA Most Valuable Player will be treated accordingly with anti-inflammatories and will undergo the needed rehabilitation, training room treatments and rest, ESPN.com reported.

"First and foremost, we want to make sure LeBron is well and completely recovered," Cavs coach David Blatt told the Northeast Ohio Media Group on Thursday. "The season is long and our main objective is that he will be well and strong for the rest of the season. But we have to fight it out and work every day to build others until he gets back after the time he needs."

One day after his 30th birthday on December, the Cavs forward admitted that his knee problem has been hurting him all year.

"I've been playing with it, and it goes away and comes back," he said. "So, the one in Miami kind of reaggravated it when I came out of the game in the third quarter."

LeBron James is averaging 25.2 points per game for his new team. The Cavaliers currently have the fifth best record in the Eastern Conference at 18-14.