Arsenal have received a boost with Alexis Sanchez fit again. But the Chilean ace is still far from full fitness. The better news is that defender Laurent Koscielny will be back after having served his suspension. Liverpool are also expected to have the midfield duo of Emre Can and Georginio Wijnaldum back for selection. The Reds are looking to take maximum points off Arsenal for the third time in a row, which would be a first since May 1998. Roberto Firmino will be key to this Anfield showdown, the Brazilian having scored three goals in his last four EPL outings against the Gunners. 17 goals have been scored in the 90th minute or later for games between these two clubs. So, sit tight!