Kyrie Irving's potential was one of the main reasons LeBron James returned to the Cleveland Cavaliers in 2014, and since that moment the point guard has developed into one of the league's best players at the one spot.
There have been ups and downs, but Irving is now realising that potential, and speaking to Cleveland.com, his four-time MVP partner believes one of the biggest improvements in his game has been the mental aspect.
"From the first day on, he's been getting better and better and better like I've stated over time," James said. "This is Year 3 for us and he's just a much better, complete basketball player from a mental side."
2016 has a hugely successful year for Irving. He won his first championship - sinking the title-winning shot - and won a gold medal at the Rio Olympics while continuing his form into the new campaign.
It's been a year since he became a father and James, a dad of three, does not believe that is a coincidence.
He added: "Obviously he's a father now so you have to grow up as a person.
"Any one of us, when you become a father you have to understand that it's not just about you anymore you have to be responsible for your child.
"And just the everyday work ethic of him saying, 'OK now we're in a position where we can compete and we can really compete for what I've been hoping for my whole life and that's a championship.' His mindset had to change and it did change."