There are other online betting websites which specialize in betting on sporting events like football , tennis, cricket matches and olympic games, the number of medals that each country will win. The odds that a player or team will win a particular event depends to a large extent on the form of the player/team, fitness levels, weather conditions, where the event is being held.
The online betting directory will usually have a separate section for betting on each sport, as most of those who bet online usually specialize in one sport like football which they are following closely. The directory will also have a section for promotions, including details of the websites which are offering free bets to new customers, so that they become familiar with the system.
Again before betting, serious gamblers should do some research on the players, their track record, before placing a bet, unlike gambling on the roulette wheel, where no research is required.