The Cushion Doesn't Lie: Re-reading Vietnamese Three-Cushion Form Through Data

I sat in the seventh row, clutching a frayed notepad. It was a quarter-final of a Three-Cushion World Cup held in Vietnam. The home player — the one I had tracked for four seasons — entered the match with a group-stage average of 1.458, higher than his Dutch opponent's 1.203. The deciding inning ended 40-38 in favour of the visitor. It took me two days to understand what had happened. It was not the arm. It was not the cue. The problem was that I had measured the wrong thing — and perhaps the whole Vietnamese billiards scene is measuring the wrong thing too.

Three-cushion is a discipline where a single error on the first shot can decide an entire inning. For two decades, people have measured it by average. The number is easy to grasp, easy to compare, but it hides a great deal. I once learned that lesson in another sport: in 2026, I used xG to predict a V.League match and got it badly wrong because the model did not account for goalkeeper form. Since then, my rule has been never to draw a conclusion from a single metric.

For three-cushion, I built a dataset with four groups. First, overall average. Second, average split by match phase — opening, middle, deciding inning. Third, decisive-inning win rate, meaning when both players are within 10 points of the target. Fourth, the number of runs of 5 points or more per match. I tracked 61 matches of 12 leading Vietnamese players in domestic and international events, from qualifiers to finals, over 18 months. I did not select by result; I took every match with complete video so I could cross-check the numbers against the footage.

My method of counting also needs to be stated. A "blank inning" is an inning in which no point was scored, whether the player deliberately played safe or tried to score and failed. I do not separate those two cases in the final figure, but I mark them with a private symbol, because a blank inning from a deliberate safety carries a different meaning from one caused by a technical error. It is a small detail, but it is precisely small details that separate a spreadsheet from a fact.

The first thing the data showed: overall average and deciding-inning average do not move together. The correlation between the two is only about 0.42. A player can score at 1.412 across a full match yet drop to 0.978 in the final inning. The average is not wrong — it is simply not enough. What decides victory is not the full-match average, but stability when pressure rises.

The second thing: beautiful scoring runs do not correlate strongly with winning. Across 61 matches, each side averaged 2.1 runs of 5 points or more. But in the 23 matches decided by no more than 3 points, the winner had 0.4 fewer runs per match than the loser. A player who strings together impressive runs does not necessarily win. The real issue lies in what I call the "blank inning" — an inning that yields no point. A top player averages 3.4 blank innings per match; in narrow defeats, that figure jumps to 4.6. A gap of 1.2 innings sounds small, but in three-cushion, every blank inning both loses a point and hands momentum back to the opponent. In an innings where both men grind through 20 turns, that extra 1.2 blank innings is the entire distance between winning and losing. I suspect many people still read the final scoreboard and draw their conclusion, when it is those scoreless innings that actually wrote the result.

For comparison, I added data from leading players worldwide. Their deciding-inning average usually hovers between 1.35 and 1.55, while the Vietnamese group I tracked falls between 0.98 and 1.28. The gap is not only about skill — it lies in how pressure is handled once the match enters its decisive stretch.

The third thing, and this is the part that made me rewrite my entire spreadsheet: the home factor. Playing in Vietnam before a home crowd is usually treated as an advantage. My data suggests the opposite for the young group. Across 18 home matches by 5 players under 30, they won 9 — exactly 50%. Their win rate on neutral ground or abroad was 61%. An 11-percentage-point gap is not enough to conclude, but it is enough to make me ask.

People tend to assign "home is an advantage" by football's inertia. But a carom table has no sixty-thousand-seat stand. Spectators sit right by the table, almost perfectly silent as the player prepares to shoot. That means home pressure becomes silence — something sometimes heavier than noise. A young player standing before family and friends, framed by the expectation that he must win at home, tends to play more cautiously than necessary. And in three-cushion, excessive caution means choosing the safe cushion route instead of the route with the higher scoring probability.

But I have to be blunt: correlation is not causation. Eighteen matches is a small sample. It may be that the cause lies not in the stands but in the schedule. When I checked again, 7 of those 9 home wins came after at least 10 days of rest; 4 of the 9 defeats fell in the third week of a continuous tournament run. The "home" factor and the "schedule" factor are tangled together, and I do not have enough data to pull them apart. Data never lies, but I have misheard it before — this time I do not want to repeat that.

When that quarter-final ended, I wrote one line in my book: "It was not the arm. It was the number I chose to trust." Four seasons later, I still have no clear answer as to why these young Vietnamese players perform better abroad. But I have a signal to watch in the next round: their blank-inning rate in the deciding stretch. If that figure keeps rising when the stands are full, then home pressure in three-cushion is no longer a matter of feeling — it is a measurable variable. And once it is measurable, it can be fixed.