The International 4 has sold out the entirety of its tickets, Valve has confirmed.

According to officials at Key Arena, the venue for the upcoming Dota 2 tournament, roughly 10,000 tickets were sold within the hour.

Scalpers have gone to work, with listings for the general admission ticket - originally sold at $99 - already up at $500.

The International 4 will run from July 18-21.