Louisville's Montrezl Harrell tweaked his knee but says it's nothing incredibly serious. (USATSI)
Louisville's Montrezl Harrell tweaked his knee, but says what looked like a bad injury is simply a sprain. (USATSI)

Montrezl Harrell became a breakout player near the end of Louisville's 2012-13 championship run. He's already projected to be a first-round pick by most for the 2014 draft.

The sophomore forward also is expected to play a key role in the Cardinals' quest to win back-to-back titles next season. Over the weekend, Harrell had to leave early from the Adidas Nations camp, a California-based event that brings together many elite high school and college players for scrimmages, drills and training.

Reports from the scene were that he injured his knee. Fortunately for Harrell and Louisville, it's apparently nothing serious.

Harrell followed this up with a response tweet to former NC State guard/UConn transfer Rodney Purvis.

Harrell posted this picture of his knee on his Instagram account Sunday night.

The 19-year-old averaged 5.7 points and 3.6 rebounds coming off the bench last season as a freshman. He also played for Team USA in the FIBA World Championships this summer, putting up 10.6 points and 3.7 boards per. The United States squad wound up winning gold in the event for just the third time in three decades.