Irelking Irelia vs Sylas Mid - KR Challenger - Patch 13.5 Season 13 - YouTube
Hwei vs. Sylas - Matchup Statistics - Patch 14.3
I saw someone make a tier list of Irelia's match ups,and I didn't agree with some of it and i had some free time so here's my version of the tier list :
IRELIA vs SYLAS (MID) | 7 solo kills, 500+ games | BR Master | 13.21 - YouTube