Modern tournament play became popular in American casinos after the World Series of Poker began, in 1970. Notable champions from these early WSOP tournaments include Johnny Moss, Amarillo Slim, and Doyle Brunson. It was also during that decade that the first serious strategy books appeared, notably Super/System by Doyle Brunson (ISBN 1-58042-081-8) and The Book of Tells by Mike Caro (ISBN 0-89746-100-2), followed later by The Theory of Poker by David Sklansky (ISBN 1-880685-00-0).

Poker’s popularity experienced an unprecedented spike in the first years of the 21st century, largely because of the introduction of online poker and the invention of the hole-card camera, which turned the game into a spectator sport. Viewers could now follow the action and drama of the game, and broadcasts of poker tournaments such as the World Series of Poker and the World Poker Tour brought in huge audiences for cable and satellite TV distributors. Because of the increasing coverage of poker events, poker pros are becoming more and more like celebrities, with poker fans all over the world entering into expensive tournaments for the chance to play with them. This increased camera exposure also brings a new dimension to the poker professional’s game—the realization that their actions may be aired later on TV.

Major poker tournament fields have grown dramatically because of the growing popularity of online satellite-qualifier tournaments where the prize is an entry into a major tournament. The 2003 and 2004 WSOP champions, Chris Moneymaker and Greg Raymer, respectively, won their seats to the main event by winning online satellites.