LeBron James, one of the greatest players in NBA history, has built a resume unmatched in the modern game—leading the league in all-time scoring and logging more seasons than any active player.

With over two decades of elite competition under his belt, the Lakers star has squared off against countless top defenders. But when asked to single out the toughest matchup, one name stood above the rest.

On the latest episode of the Mind the Game podcast with Steve Nash, James pointed to former Defensive Player of the Year Ron Artest—now known as Metta World Peace—as his most difficult defensive assignment. “Yeah, Ron Artest,” LeBron said. “Metta World Peace now. Really good with his hands, laterally was really good, strong as an ox”.

James recalled one of their earliest matchups when Artest was with the Indiana Pacers, saying it was a defining moment in his young career. “We played a game in my early years when he was in Indiana, I mean, it was challenging for sure. One of the best defenders probably I’ve played against,” James continued.

Ron Artest #23 of the Indiana Pacers posts up LeBron James #23 of the Cleveland Cavaliers during a regular season game. (Andy Lyons/Getty Images)

“I had to go straight back to my early days. Ron definitely had you like, OK this is what the league is about. OK, let’s continue to lock in—this is a hell of a test for you as an 18-year-old kid out of high school with a target on your back. I was like yeah, I love this. This is awesome,” he added.

James and Artest clashed 21 times in official NBA games, with LeBron holding a 13–8 record in those matchups. Across those contests, James averaged 26.9 points, 6.8 assists, and 6.7 rebounds while shooting 49 percent from the field.

Artest reflects on LeBron’s early pickup game with Michael Jordan

While LeBron James and Michael Jordan never shared an official NBA court, their paths did cross in a memorable pickup game when James was just 16 and Jordan was nearing the end of his playing days. Artest, who also participated in the game, reflected on witnessing James’ potential even at that young age.

“Everybody knew who he was. He was already famous. He was bigger than all of us in the gym,” Artest said during an appearance on Podcast P with Paul George. “So he’s coming into the gym, and I’m like, ‘Alright, cool, I wanna see what he’s got.’ And he’s cooking. He’s 15 or 16, posting, getting to the basket. And I’m like, ‘This is going to be a huge issue’”.

Seeing James dominate that game had a lasting impact on Artest’s mindset. “He actually motivated me,” Artest added. “When I saw that, it motivated me. I’m like, ‘I gotta go to work.’ He’s coming into the league cooking. I was not like that at 15”.