Esports Map Picks: 57% Ban the Same Map Twice in a Row
A study of 1,240 professional series across CS2, Dota 2 and Valorant in 2024 found that 57% of teams banned the same map twice in a row when they won the opening ban phase. The pattern holds across all three titles and survives when you strip out tier-one events. It is not a quirk of one roster or one patch.
The data behind the number
The sample covers matches from January to November 2024, drawn from HLTV's archive for CS2 and Liquipedia for the other two. Only series with a full veto log were counted. Of the 1,240, roughly 710 showed a repeat ban in consecutive series by the same team.
The effect is strongest in CS2, where the repeat rate sits at 61%. Valorant comes in at 54%, Dota 2 at 52% — though Dota's ban phase works differently enough that the comparison is loose. Filtering to matches after June, once the CS2 map pool had settled following the Train swap, the figure barely moves: 59%.
What matters for bettors is the second-order effect. When a team repeats a ban, the market often prices the veto as if it were fresh information. It isn't. The ban is stale by the time the odds are posted.
Why teams repeat bans
Coaches are conservative by default. A map you've banned for six weeks is a map you haven't prepared, and preparing a new one costs scrim hours that most tier-two orgs don't have. The repeat ban is a resource decision as much as a strategic one.
There's also a feedback loop in the data. Teams that lost on a map they didn't ban are 23% more likely to ban it in their next series — but they're also 31% more likely to ban it again the series after that, regardless of result. Once a map enters the "banned" column, it tends to stay there.
The exception is the top eight or so teams globally, where repeat-ban rates drop to around 44%. Those squads have the coaching depth to rotate vetoes deliberately.
What this means for map markets
If you're betting map handicaps or correct-score markets, the veto log is public roughly 30 minutes before the match. The edge is in reading it faster than the market adjusts, not in predicting it.
Two practical notes. First, a repeated ban tells you which map a team isn't preparing, which is useful for over/under on map duration — unprepared teams tend to play slower, more default-heavy rounds on their weak maps. Second, the 57% figure is a base rate, not a signal. It tells you what usually happens, not what will happen in the next series.
Bookmakers have started pricing veto information more tightly since mid-2024. The window between the veto release and the odds move has narrowed from around four minutes to under 90 seconds at the major books.
The question nobody's answering
The obvious follow-up: does the repeat-ban habit actually help teams win? The data here is murky. Teams with high repeat-ban rates win 51.2% of series in the sample — statistically indistinguishable from the 50.8% for teams that rotate. The conservative approach isn't costing them, but it isn't buying them anything either.
The more interesting angle is whether the pattern breaks when a map is added or removed from the pool. The Train swap in CS2 gave us one natural experiment, and repeat-ban rates dipped to 48% for three weeks before climbing back. If Valve rotates another map in 2025, that three-week window may be the most exploitable period in the calendar — and the least understood.
If you're staking on map markets, keep the same limits you'd apply to any other bet. A 57% base rate is a starting point for analysis, not a licence to chase.