Arsenal travel to Germany to play Borussia Dortmund in the Champions League on Wednesday.
The Gunners are level at the top of Group F with Jurgen Klopp's team and Italian side Napoli with three games to play.
You can find out more about our opponents below.
Full name: Borussia Dortmund
Manager: Jurgen Klopp
Club colours: Yellow shirts, black shorts with yellow and black hooped socks
Nickname(s): Die Schwarzgelben ( The Black and Yellows)
Three facts about Borussia Dortmund:
- Dortmund were runners-up in last season's Champions League.
- Jurgen Klopp's team are currently second in the Bundesliga table, one point behind leaders Bayern Munich.
- Dortmund lost their first game in the group 2-1 to Napoli but have taken maximum points since then
The Polish striker scored the winner against the Gunners in the reverse fixture in October with a clinical volley in the 83rd minute. Lewandowski also scored a hat-trick in their 6-1 win over Stuttgart on Friday. The Gunners will have to be on top form to keep him out this time.