Arsenal host Olympiakos at the Emirates Stadium for the second leg in the Europa League’s round of 32 this evening.

Alexandre Lacazette’s 81st-minute goal was enough for the Gunners as they secured a 1-0 win at the Stadio Georgios Karaiskaki last week.

This result was just what Mikel Arteta wanted as an away tie in Piraeus was always going to be a difficult one. You only have to look at the atmosphere the Gavri provided last Thursday to illustrate how difficult it is playing against the 12th man.

Arsenal will be much more comfortable at the Emirates, however, as the Gunners have only lost twice at home in 17 Europa League games.

Still, Arsenal shouldn’t underestimate Olympiakos. Before last week, the Greek giants had last tasted defeat in November 2019, so losing isn’t a regular occurrence.

Olympiakos recovered brilliantly after their loss to Arsenal, beating their title rivals PAOK Thessaloniki 1-0 to go five points clear at the top of the Greek Super League.

With that huge win under their belts, Olympiakos will be hungry for revenge when these two sides meet again.

Here are our ‘Key Battles’ to keep a close eye on…