Poker giant PokerStars will host an online poker tournament later this year with the biggest ever buy-in, as part of the World Championship of Online Poker in September.

The $51,000 buy-in Super High Roller No Limit Hold’em tournament will have a guaranteed prize pool of at least $1m, and will take place on September 20th across PokerStars’ licensed websites.

Players from across the world will be able to take part using the operator’s and uk domains.

The previous record for the biggest ever buy-in for an online poker tournament was $25,000, which was shared by Heads-Up tournaments in the World Championship (2008, 2009, 2010) and Spring Championship of Online Poker (2009, 2010, 2011). There have also been a number of non-Heads-Up events with a buy-in of $10,000.

The Super-High-Roller event will take place a week before the WCOOP Main Event, which will be held on Sunday September 27th with a $5,200 buy-in, and guaranteed prize pool of at least $10m.

“Over the last few years we have seen the emergence of Super High Roller events at live events across the globe,” said Team PokerStars Pro member Daniel Negreanu. “I think it only makes sense that the world’s largest poker site is also the host of the largest buy-in online poker tournament ever. I'm excited to test my skills against the best of the best, online.”

This year will be the 14th edition of PokerStars’ World Championship of Online Poker, which has grown from a total prize pool of $0.7m in 2002 to $61.9m last year.

In related news, PokerStars has launched a series of free online tournaments via to give fans the opportunity to meet Brazilian superstar footballer Neymar Jr and join him in the Neymar Jr Charity Home Game, a star-studded live charity poker tournament.

Benefiting the Neymar Jr Institute, the charity event will take place on July 26th during the Brazilian Series of Poker (BSOP) in São Paulo.

The event will bring together Neymar Jr, friends, celebrities and poker players for a fun-filled event with all proceeds from the USD$1,000 buy-in registrations going to the Neymar Jr Institute. The prizes up for grabs include an entry to the BSOP Millions, Neymar Jr signed memorabilia, PokerStars donated prizes, and much more.

“PokerStars is delighted to be supporting this event and the work of Neymar Jr’s Institute,” said Sue Hammett, head of corporate giving for PokerStars. “It aligns with the key themes of our corporate giving programme ‘Helping Hands’ using sport to transform and enrich people's lives. This continues our long tradition of working with charities around the world.”