Edit: Vast majority of CS tournaments are structured into two phases, "groups" and playoffs. Losing a match in groups means falling through into the "lower bracket", one Major tournament (ESL Pro League) even has three brackets. This leads to many "upsets" as the top teams play the opening matches against much lower-ranked opponents half-asleep, and then march through to (semi-)finals through the lower/lowest bracket. This effect was clearly demonstrated in a recent tournament with no second chances (Gamers8), where every underdog got eliminated in the first round. i don't bet on CS because of the unpredictability enabled by bracketing, but anyone could have made a shit ton of money by betting on the higher-ranked teams in the first round of Gamers8. I'm convinced the bracketing is a result of collusion between tournament organizers and bookmakers, their major sponsors.