Arsenal and Liverpool are drawing 3-3 in an absolute humdinger at the Emirates.
Philippe Coutinho and Mo Salah had put the Reds 2-0 up, but just 388 seconds later, Arsenal were ahead thanks to strikes from Alexis Sanchez, Granit Xhaka and Mesut Ozil.
Roberto Firmino's equaliser restored parity.
Arsene Wenger sprung a surprise by naming Ainsley Maitland-Niles and Jack Wilshere in his starting XI.
An epic second half initially saw a rampant Liverpool double their advantage shortly after the restart, Salah's shot deflecting in after Firmino led a superb counter-attack.
Their two-goal lead was short-lived, though, as within six remarkable minutes a resurgent Arsenal were front.
Alexis Sanchez headed through the legs of Simon Mignolet from Hector Bellerin's pinpoint right-wing cross, then the goalkeeper was beaten too easily by Granit Xhaka's viciously swerving drive.
The comeback was seemingly complete thanks to Mesut Ozil's sensational finish, the playmaker chipping Mignolet after a sublime one-two with Alexandre Lacazette, but Firmino beat Cech with 19 minutes left to level the scores.
A draw was certainly the fairest outcome in a thrilling match where neither side could defend competently, with Firmino's intervention ensuring Arsene Wenger is yet to beat Klopp's Liverpool in five attempts.