I'm not sure which specific "IG冠军" you're referring to, as there are many possible contexts where the term "IG champion" could be used. For instance, it could be about the winner of a particular esports tournament, a sports team, or even a fictional character.

If you're asking about the duration of an esports match or tournament where IG (Invictus Gaming) has won a championship, these typically last several hours. Esports matches can vary in length, but a standard competitive match can last from 20 minutes to an hour or more, depending on the game and the level of competition.

If you're asking about a specific event or match, please provide more details so I can give you a more accurate answer.