K-1 World Grand Prix 2003 Final was a kickboxing event promoted by the K-1 organization.

In total there were fourteen fighters at the event, representing ten countries.

The considered favourite leading in was Stefan "Blitz" Leko, who was on a five-fight K-1 win streak throughout 2003, and had beaten Peter Aerts, Mike Bernardo and Francisco Filho leading up to the World Grand Prix.

However, due to contractual disputes that arose prior to the tournament final, Leko was pulled out of the competition and replaced by former boxer Francois Botha.

The tournament winner was Remy Bonjasky who defeated Musashi in the final by third round unanimous decision.