Here is a list of some of the top 10 biggest online poker tournaments hosted in 2021:
1. World Championship of Online Poker (WCOOP) – Hosted by PokerStars, it is one of the largest online poker series featuring multiple events and huge guaranteed prize pools.
2. Spring Championship of Online Poker (SCOOP) – Another massive tournament series offered by PokerStars, with high-stakes events and significant prize pools.
3. World Series of Poker Online (WSOP Online) – The online version of the iconic WSOP tournament, featured on WSOP.com and GGPoker.
4. PokerStars Sunday Million – A popular weekly online poker tournament held on PokerStars, guaranteeing a million-dollar prize pool.
5. Powerfest – Partypoker’s flagship tournament series, offering a wide range of events and impressive prize pools.
6. XL Series – 888poker’s prestigious tournament series, featuring a variety of events for different buy-ins and skill levels.
7. GGPoker Super MILLION$ – A high-stakes weekly tournament hosted by GGPoker, providing players with the chance to win big.
8. Online Super Series (OSS) – Americas Cardroom’s renowned tournament series, offering a vast array of events and generous guaranteed prize pools.
9. Super High Roller Bowl Online – A prestigious tournament series designed for high-stakes players, hosted by partypoker.
10. Caribbean Poker Party Online – An exciting online poker festival organized by partypoker, featuring numerous tournaments and attractive prizes.
Please note that these rankings are subjective, and other prestigious tournaments may exist based on various factors such as buy-in amounts, prize pools, and reputation among players.