Ashe vs Sivir ADC Matchup
Ashe ADC wins 49.9% of 3,308 Low Elo games against Sivir ADC, +0.7 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.
How to play as Ashe
Use Volley to test or bait Spell Shield, then look for Enchanted Crystal Arrow while Sivir E is unavailable. If she holds E, keep pressuring with autos and Frost Shot instead of forcing R into the shield.
Stand off the minion line so Sivir cannot hit you and clear the wave with the same Q or Ricochet; her waveclear is stronger, so keep the wave near your tower and trade when she steps forward.
Sivir E has a substantially longer cooldown than Ashe W, so she cannot block every Volley with Spell Shield.
Sources
These notes come from r/AsheMains.