WSOP Main Event
WSOP Main Event The longest heads-up match in World Series of Poker Main Event history lasted 10 hours and 5 minutes, spanning a grueling 199 hands. This legendary endurance battle took place at the 2018 World Series of Poker World Championship inside the Rio All-Suite Hotel & Casino. John Cynn from Indiana and Tony Miles from Florida competed in the 2018 marathon duel. The heads-up battle began at 6:45 p.m. on Saturday, July 14, and did not conclude until 4:50 a.m. on Sunday, July 15.

PokerStars Championship
The longest heads-up poker match in major live tournament history lasted 10 hours and 50 minutes. This record-breaking duel took place at the 2017 PokerStars Championship Macau Main Event, where Elliot Smith ultimately defeated Tianyuan Tang. ) Th match lasted 10 hours, 50 minutes. Ironically, the players spent an hour negotiating a chip chop before the grueling 260-hand match even began.

Longest WSOP Europe Main Event
Longest WSOPE Main Event John Juanda vs. Stanislav Alekhin (2008 WSOP Europe) lasted a total final table time of 19 hours and 10 minutes, with a heavily drawn-out heads-up phase that pushed well into the next day.

Longest Uninterrupted Poker Cash Session
Zach Gensler played $1/$3 No-Limit Hold'em continuously for 124 hours at Resorts World Las Vegas. He broke the previous Guinness World Record held by Phil "The Unabomber" Laak, who logged 115 hours at the Bellagio. While they rotated through various opponents rather than playing a strict single heads-up match, it stands as the peak of individual poker endurance.

Legendary 4-Month Battle
In 1949, poker icons Johnny Moss and Nick "The Greek" Dandolos played a marathon heads-up match in Las Vegas that lasted four months. They took breaks only to sleep and eat. This historic match is widely credited with inspiring the creation of the World Series of Poker.