Chicago Bulls head coach Billy Donovan called Lonzo Ball's road to recovery an "uphill battle" as the 25-year-old went under the knife on Monday for the third procedure on his troublesome left knee.

Ball last played in an NBA game on January 13 last year. The latest update on his situation was that he was failing to make any significant progress, and that this extra procedure – a cartilage transplant – could rule him out until the middle of 2024.

One of the best guard defenders in the league, Ball has a career average of 1.6 steals per game. This season there are only five players – O.G. Anunoby (2.0), Jimmy Butler (1.9), Fred VanVleet (1.7), Shai Gilgeous-Alexander (1.7) and Herbert Jones (1.7) – averaging a higher figure.

Speaking ahead of Monday's game against the Philadelphia 76ers, Donovan said while it is a long road ahead, he is confident in Ball's work ethic and motivation to get back to full strength.

"I know he's going to work really hard [on his rehab]," he said. "[The doctors] felt like the surgery went well.

"I do know that Lonzo, just based on the information he was able to gather from different sets of doctors, [was] making the decision that he felt like this was the best chance to be able to get him back on the court. 

"We all understand that that is going to be an uphill battle for him, but I know he's going to do everything possible in his rehab to get himself back on the court.

"He's certainly got a long road to recovery, a long road to get himself at a place where he can get back on the court and playing again. 

"But I am hopeful with his work ethic and his commitment and drive and just how eager he is to play, that he's gonna exhaust every opportunity to do that."