Fans cheer for their teams during the opening ceremony of the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

This general view shows the opening ceremony of the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

The trophy for the International Dota 2 Championships is displayed to the crowd during the opening ceremony in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

Fans cheer for their teams during the opening ceremony of the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

Members of Team OG, champion of the 2018 Dota 2 Championships, display the trophy during the opening of this year's International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

Fans cheer for their teams during the opening ceremony of the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

Gabe Newell, co-founder of game-maker Valve, speaks next to the winner's trophy during the opening ceremony of the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

Players (behind glasses) prepare before a match during the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

Members of team VP (L-behind glass) prepare before a match during the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT / TO GO WITH China-eSports-gaming-Internet,FOCUS by Peter STEBBINGS

A screen shows a live image of the Dota 2 eSports match between team Alliance and team RNG during the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT

ESports fans look on during the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT

A screen shows a live image of the Dota 2 eSports match between team Alliance and team RNG during the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT

Members of team RNG (bottom, behind glass) compete against team Alliance during the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT

Members of team Alliance (behind glass) compete against team RNG during the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT

Members of team Alliance (behind glass) compete against team RNG during the International Dota 2 Championships in Shanghai on August 20, 2019. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in Shanghai in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT

This photo taken on August 19, 2019 shows Dota 2 players of team RNG posing for a group photo during the media day of the International Dota 2 Championships in Shanghai. - A record 33.5 million USD is up for grabs but professional eSports players like those competing in The International in mid August, pay a physical price with deteriorating eyesight, digestive problems and wrist and hand damage. (Photo by STR / AFP) / China OUT