This Sadio Mane vs Tierney incident was a controversial one early in the game as Arsenal fans felt the Senegalese winger should’ve been sent off for this foul on Tierney. Mane’s arm catches Tierney in the face- he was only given a yellow card, and ended up scoring the equaliser for the Reds as well!
Mane elbowing Tierney- Mane arm in Tierney face