Which bets can be combined to form a multi (parlay)?

The vast majority of the available bets may be combined freely. There are a few exceptions, however, such as certain Formula 1 bets that can only be placed as single bets. It is the bookmakers who decide what bets can be combined and their decision is based on various factors, such as the respective game or event. You will be informed of their decision by the time the bets are placed. Please note: several bets on one and the same event/game cannot usually be placed as a multi (parlay) or system bet.