Some Marvel Rivals heroes are worth more next to one particular teammate. Team-Ups are the game's built-in version of that, but a pair that shares a Team-Up does not automatically win more. The duo numbers here count how often two heroes win on the same team, whatever the reason, and that is where you find out which pairs actually do.
What a Team-Up is
Each hero has two Team-Up abilities, each tied to one other hero, and picks one of them in spawn. If the tied hero is not on the team, the ability gives a basic boost. If they are, it becomes the enhanced version. NetEase reshuffles the pairings over time. That is the part that separates Marvel Rivals from Overwatch, where a synergy is just two kits that happen to overlap well. Here it is a rule baked into the game.
What the duo numbers measure
The duo win rate on a hero's page counts every tracked match where both heroes played on the same team. The game does not report which Team-Up a player picked, so the number blends matches where an enhanced Team-Up was live with matches where it was not. A high duo win rate tells you the pair reliably wins together, without claiming a Team-Up caused it. For the pairs below, the match counts are big enough to trust the edge.
Three pairs winning more than most
These come from recent Marvel Rivals Standard data, all ranks, all game types. They move between patches and team-up reshuffles, so treat the exact decimals as a snapshot rather than a constant. They were picked for sample size and role coverage.
Gambit and Rogue, 54.2% over ~16,400 matches
The highest-sample synergy pair in the current data. Both are X-Men, and Rogue's Mr. & Mrs. X Team-Up is tied to Gambit. Gambit is a Strategist and Rogue is a Vanguard, so the pair plays as frontline commitment plus a setup-heavy support rather than two damage dealers stacking. With over 16,000 tracked matches behind it, this is one of the most confident synergy numbers on the site. If you are already planning to pick either, locking the partner is an easy bump to your odds.
Spider-Man and Peni Parker, 55.4% over ~7,700 matches
The Web-Warriors pairing. Peni Parker is a Vanguard whose trap-heavy kit locks down a position for the team to regroup into, and Spider-Man is a Duelist who can over-extend on his web mobility knowing there is crowd control waiting if the enemy dives back. The two cover each other almost perfectly. A ~7,700-match sample is enough to trust, and a 55% edge is sizeable in a game where most synergies settle in the 52 to 54 range.
Hela and Namor, 55.2% over ~8,400 matches
Two Duelists, which is unusual, since most high-synergy pairs in the data cross roles. Hela's ranged precision plus Namor's turret-anchored zone control means the enemy has to push through a corridor Hela already has a sightline on, and if they flank instead, Namor's turrets catch them. The pair fades on open-sightline maps where the turrets are easy to burst, but on maps with real choke structure it has been one of the quieter standouts this season.
Top duos versus best kit synergies
Every hero page exposes two views on its strongest-duos card. The default, Top duos, ranks pairings by absolute combined win rate, which is what the three numbers above show. That answers who is strong right now alongside this hero, and it bakes in both heroes' individual meta strength, which is usually exactly what you want when you are picking for the current patch.
The Best kit synergies toggle subtracts each hero's individual edge from the pair's win rate before ranking. If two 55% heroes post a 60% pair win rate, that is exactly what their individual strength already predicted, so the kit synergy is zero. A 62% pair from the same two is a real lift over baseline, a sign that something, kit interaction or an enhanced Team-Up or both, is producing extra win rate independent of how strong each hero is alone. Numbers in this view are deltas over expected, with the subtitle "Lift over expected when paired with X."
If you want to know whether a pair that shares a Team-Up is worth building around, the kit-synergies view is the more useful read. Two strong meta heroes who share a Team-Up will look great under Top duos whether or not the Team-Up is doing any work, while Best kit synergies pulls the individual-strength noise out, so a high residual means the pairing is winning more than the heroes' solo strength predicts. Use Top duos to ask who you want on your team this patch, and Best kit synergies to ask whose abilities actually combo with this hero.
How Team-Ups bend the counter read
The counters on a hero's page are averaged across every team the hero played on, so a 54% matchup blends matches where their enhanced Team-Up was live with matches where it was not. If your team already has the partner, the edge can be a bit stronger than the aggregate suggests. The data cannot say by how much, because the game does not report which Team-Up was picked. The reverse holds against you, so watching which pairs the enemy locks tells you how their damage and sustain will scale.
Building around a pair
The strongest Marvel Rivals comps do not pick the best six heroes in a vacuum. They pick a pair that works and fill the rest with heroes that cover the archetype gaps. Pick the pair you want to run, use the team builder to fill the other four slots against the enemy lineup so you can see which fillers keep the pair's synergy intact, and check the map before you lock, since zone-control pairs lose edge on maps with multiple flanks and mobility pairs lose edge in narrow corridors. Mid-match, the Counterwatch app runs the same scoring live, and when the enemy picks a comp that beats your lineup it surfaces swap candidates as the picks happen.