I have the top 16 archetypes and the Dimir Tempo archetype ID. Now let me fetch all 16 matchup winrates in parallel.
Here is Dimir Tempo's head-to-head winrate (excl. draws) against the top 16 Legacy archetypes over the past 60 days:
FAVORABLE MATCHUPS (above 50%)
vs TES: 70.59% (12-5, 17 matches)
vs Izzet Delver: 69.44% (25-11, 36 matches)
vs Doomsday: 64.18% (43-24, 68 matches)
vs Grixis Reanimator: 62.96% (17-10, 27 matches)
vs Azorius Midrange: 61.22% (30-19, 51 matches)
vs Show and Tell: 56.25% (18-14, 32 matches)
vs Blue Artifacts: 54.29% (19-16, 35 matches)
ROUGHLY EVEN (close to 50%)
vs Energy: 47.37% (18-20, 38 matches)
vs Dimir Midrange: 45.16% (14-17, 31 matches)
UNFAVORABLE MATCHUPS (below 45%)
vs White Beanstalk: 41.67% (5-7, 13 matches)
vs Tron: 42.86% (12-16, 28 matches)
vs Mystic Forge Combo: 42.86% (6-8, 14 matches)
vs Death & Taxes: 42.00% (21-29, 53 matches)
vs Lands: 36.67% (11-19, 30 matches)
vs Aluren: 33.33% (5-10, 16 matches)
vs Welder Combo: 33.33% (4-8, 12 matches)
Overall, Dimir Tempo (the format's most-played deck at ~9% meta share, 53.95% overall winrate) performs well against blue permission mirrors and combo decks that interact on the stack (TES, Izzet Delver, Doomsday), but struggles against hatebears (Death & Taxes), permanent-based combo (Aluren, Welder Combo, Lands), and big mana (Tron). The Lands matchup is particularly lopsided at just 36.67%, which is notable given Lands is one of the better-performing decks in the format right now at 55.93%.
Sources: Data spans 60 days (July 8 - September 7, 2026) across 66 tournaments (64% MTGO, 36% Melee). Recent events with Dimir Tempo results:
https://www.mtgo.com/decklist/legacy-challenge-32-2026-09-0612853700
https://www.mtgo.com/decklist/legacy-challenge-32-2026-09-0612853695
https://www.mtgo.com/decklist/legacy-challenge-32-2026-09-0512853685