Handicap betting often appears in tennis markets, but phrases like set handicap 1.5 can seem unclear at first glance, especially if it’s not something you’ve encountered before.
This blog post breaks down how this type of betting works, what the 1.5 figure refers to, and how outcomes are decided. It includes simple examples to make everything easier to follow.
Read on to learn more.
A set handicap adjusts the outcome of a match in a specific way. It doesn’t change how the match is played—that unfolds as usual—but it does affect how the outcome is interpreted afterwards for betting purposes.
In simple terms, one player is either given a numerical advantage or placed at a disadvantage once the match finishes. This is done using a figure that applies to the number of sets won, not games. It’s an attempt to offer a more level playing field in matches that may appear one-sided.
This method comes into its own where there’s a clear difference in strength between players. The added number shifts the dynamic—at least on paper—and creates more balanced choices.
Match structure plays a role here. Most matches are best of three sets, while others, particularly in the men’s game at major tournaments, are best of five. This difference becomes important in how the added number plays out.
A commonly seen line in these markets is 1.5. But how does that actually apply?
When a set handicap of 1.5 is used, one player is effectively given a head start of 1.5 sets, or the other begins with a 1.5 set disadvantage. Since it’s not possible to win half a set, the result on this line is always one side or the other—there’s no middle ground.
This means if a player is listed at -1.5, they must win the match by a wide enough margin that even after subtracting 1.5 sets from their total, they still come out ahead. In a best-of-three format, that means only a 2-0 result would meet the condition. A 2-1 scoreline wouldn’t be enough. For best-of-five matches, 3-0 or 3-1 would work, but a 3-2 score wouldn’t.
If a player is given +1.5, they can still qualify even in defeat, but only just. In best-of-three, this includes both winning the match (2-0 or 2-1) or losing narrowly (1-2). In best-of-five, they can win 3-0 or 3-1, or lose 2-3 and still qualify on this line. Anything more one-sided would fall short.
This type of market is often used where there’s an expectation that one player will dominate or that the underdog might push the match further than expected. The structure of the match, how players usually perform over longer formats, and the type of court all play a role in how this line might apply.
Of course, no bet is settled purely on theory. The official rules that apply to these markets determine how outcomes are decided in practice.
Once the match is over, the numbers used in set handicap betting come into effect. The bookmaker adjusts the official result by the amount shown on the line—either adding it to one side or subtracting it from the other—and then uses that to determine the outcome.
Because 1.5 is a decimal number, the result cannot be level after the adjustment. There will always be a clear side that qualifies.
Although this blog post focuses on sets, there is also a similar option using games instead. Game handicaps involve the total number of games won and are calculated separately from set-based markets.
How the match ends can also influence the settlement. Most bookmakers will not settle bets on a match that isn’t completed, but there are exceptions. For example, some rules state that if a specific point of the match is reached, such as the end of the first set, the market can stand. Where players retire or do not start the match, different rules can apply.
Tie-breaks are counted within the overall set structure. If a set ends in a tie-break, that set still counts as completed. In some formats, especially doubles, a final set may be replaced with a super tie-break played to a specific number of points. Even in those cases, the match is recorded as having finished 2-1, and that’s the result the bookmaker will use for set-based calculations.
It’s worth checking the terms listed in the market you’re exploring. These can vary between bookmakers and even between tournaments. Knowing how those terms affect the outcome can clarify why a particular result is settled one way rather than another.
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**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.