Both Teams to Score (BTTS) Explained, With the Maths Behind It

Both teams to score, usually shortened to BTTS or written as GG on some European sites, is a two-way market: yes, both sides score at least once; no, at least one side fails to score. Who wins is irrelevant. A 1-1 draw and a 4-1 win both settle BTTS yes; a 2-0 and a 0-0 both settle BTTS no.

The market is popular because it stays alive for the whole match in a way a result bet often does not. It is also one of the three markets LiveWin grades in public, alongside 1X2 and over/under 2.5, because its outcome is unambiguous and it tests a different part of the model from the result.

BTTS yes is the probability that the home team scores and the away team scores. If the two were independent, it would be the product of each team's probability of scoring at least once. Each of those is one minus the chance of a clean sheet for the opponent, which is why the clean-sheet rate and the BTTS rate on a team hub always move in opposite directions.

Goals are not quite independent, which is where a scoreline model earns its keep. LiveWin sums every scoreline in its Poisson distribution in which both columns are at least one, after a Dixon-Coles adjustment for the correlation between low scores. That sum is the BTTS yes probability; BTTS no is simply the remainder.

The combined market both teams to score and over 2.5 goals is common. It needs three or more goals with at least one from each team, so 2-1 qualifies but 3-0 and 1-1 do not. Its probability is the sum of a narrower set of scorelines and is always lower than either market alone.

The two markets are strongly related but not the same. A match between two attacks that concede little may have a high over 2.5 probability and a modest BTTS probability if one side is expected to dominate; a scrappy fixture between two poor defences may be BTTS-likely and total-neutral. Reading them side by side on a match page says more than either does alone.

A 62 percent BTTS yes is a lean, not a certainty. The way to judge the model is not one match but the ledger: LiveWin records every BTTS call before kickoff, settles it against the final score, and publishes the hit rate for the market next to the 1X2 and totals figures. The BTTS hit rate has typically sat in the high fifties, which is what a calibrated two-way market should look like.

Look at the price too. BTTS yes is often quoted between 1.70 and 2.00, implying 50 to 59 percent. A model at 62 percent against a 55 percent implied price is a small edge; the value finder only flags it when the gap clears the model's threshold, and the ledger's return on priced picks shows whether such edges have paid at all.