Senna Support vs Sivir ADC Matchup

Senna Support wins 53.9% of 1,558 Low Elo games against Sivir ADC, +2.1 points vs expected, 2-patch window 26.19-26.20.

Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.

Why Senna is favored

Senna can poke from beyond Sivir's auto range, and her passive range growth makes repeated step-up trades harder over time. Sivir can block one spell with Spell Shield(E), but Senna can keep threatening with autos and Piercing Darkness(Q), so Sivir has to spend that shield carefully.

How to play as Senna

Take quick auto-Q trades as Sivir steps up for farm, using your range to collect Mist; bait Spell Shield(E) before committing Last Embrace(W).

Senna starts with 600 attack range to Sivir's 500, and Absolution(P) can increase her range as she collects Mist.

Sivir's Spell Shield(E) blocks one Senna spell, so it can deny Last Embrace(W) if timed to its root.

How to play as Sivir

Save Spell Shield(E) for Senna's Last Embrace(W) when she looks for a catch, and use Ricochet(W) to clear the wave if Senna is trying to hold it near her side. (Unverified: no source confirms this note.)

Sources

These notes come from r/sennamains, checked against the champions' abilities.