

The best counters to Senna in Master+ coordinated 5v5 games as Support are Zyra (61.3% win rate, 59 games), Braum (56.1% win rate, 112 games) and Nautilus (55.2% win rate, 205 games). These picks are the strongest observed answers to Senna in the current sample. Each win rate is that counter's result versus Senna in coordinated team games, not a Solo Queue lane stat.
The best calculated counters to Senna in Master+ coordinated 5v5 are Zyra (61.3% win rate, 59 games), Braum (56.1% win rate, 112 games) and Nautilus (55.2% win rate, 205 games).
Senna has a 50.5% win rate across 5,978 Master+ coordinated 5v5 games as Support. That sample is Flex 5 and Ranked 5v5 team play, not Solo Queue.
draft-meta-latest · Public draft-meta aggregate from benchmark JSONL matches with source-tier weighting and patch recency weights.
Draft-meta and champion-coordinated rows use different populations. Do not merge sample counts or treat pairwise synergies as a measured 5-man shell.