Animosity often defines the NBA Playoffs, but sometimes, the fiercest battles forge the strongest bonds. A prime example is the connection between Donovan Mitchell and James Harden, a mentorship born from a playoff defeat that is now paying dividends for the Cleveland Cavaliers.

Rewind to the 2019 first round. A young Donovan Mitchell and his Utah Jazz were heavy underdogs against James Harden's Houston Rockets. The series unfolded as predicted, with Harden's Rockets eliminating the Jazz in five games. Mitchell struggled mightily in the clincher, shooting just 18% from the field. It was a brutal, formative playoff lesson.

But in the aftermath, Harden approached the dejected young star. That moment of post-game counsel, as Mitchell recalls to The Athletic, became a career turning point. "I tell (Harden and Chris Paul) all the time how that second year when we played them... changed my entire career," Mitchell said. "You don’t succeed without failure... I can tell you that I’m upset... But you know — I’m gonna be better."

Fast forward to today, and both guards are teammates in Cleveland. Mitchell has indeed been better, evolving into the Cavs' franchise leader and a perennial All-Star. His growth, fueled in part by that 2019 lesson in resilience, has helped propel Cleveland back into consistent playoff contention, including a run to the 2025 Eastern Conference Semifinals.

It's a powerful reminder that in sports, today's playoff rival can become tomorrow's teammate, and the toughest losses often lay the foundation for future success. For Mitchell and the Cavs, a lesson learned seven years ago is still shaping their playoff mentality today.