The Chilean superstar made his first start for Arsenal since last season after recovering from an injury but was helpless to prevent Jurgen Klopp’s side from sealing a crushing victory.

Goals from Roberto Firmino and Sadio Mane gave the hosts a 2-0 lead at half-time and Mohamed Salah and Daniel Sturridge completed the rout after the break.

Sanchez struggled to make an impact and was dragged off after 60 minutes to make way for France international Olivier Giroud.

The 28-year-old cut an increasingly frustrated figure on the pitch but Gooners thought they saw the playmaker smirking on the bench as he watched his side crumble.