Arsenal face Manchester United this weekend, but unlike the Red Devils, they have another huge game around the corner.
The Gunners have a Champions League game against Borussia Dortmund, one which if they lose could even put them under pressure to claim second place in their group.
They are five points behind the Germans, with Anderlecht hot on their tails, and even if they beat the Bundesliga side, they need them to slip up against the Belgians in their final match.
Dortmund have had a tough season so far in their domestic league, but they have a rare piece of good news on the horizon.
Manager Jurgen Klopp has confirmed defender Mats Hummels is ready to return, after spending a month out through injury.
He told reporters: "He is catching up as fast as we thought. If nothing happens in the next few days, his return match will be Wednesday against Arsenal."
Hummels is Dortmund's captain and a key figure in their defence. When Arsenal beat Dortmund at their own ground last season, it was no coincidence he was missing through injury.
He is a target for Manchester United, and according to recent reports rated at £47 million, while Arsenal have even been linked too. He will get a close-up look at The Emirates next week.