Luka Doncic has been on the receiving end of a lot of criticism with regard to his fitness for pretty much his entire career. He doesn't possess the body type of your typical NBA player, which to some, is a clear indication of the Mavs superstar's lack of hard work and dedication.

Well, Mavs fans can get a little bit excited with a recent clip of Luka putting in the work just two weeks after their season ended at the hands of the Golden State Warriors in the Western Conference Finals. As it appears, Doncic intends to work a lot harder this summer:

The Mavs are still officially on vacation and they will be for a few more months. However, this isn't stopping Luka from hitting the gym. There's no denying that the 23-year-old has heard all the criticism about his fitness level, so perhaps he is now out to prove his haters wrong.

Luka Doncic is an extremely gifted individual. His skills on the basketball court are second to none. At this point in his career, it just feels like the Mavs star will be able to take his game to the next level if he meticulously works on his physical fitness. It looks like Luka has heard the message loud and clear.