Arsenal

• The only previous matches between Arsenal and Slavia Prague in European competition were in the group stages of the 2007-08 UEFA Champions League - Arsenal won 7-0 at home before drawing 0-0 away. In the 7-0 win, five of Arsenal's goals were scored by players aged 20 or younger (x2 Walcott, x2 Fàbregas, x1 Bendtner).
• In all European competition Arsenal are unbeaten against Czech opposition (W7 D1 L0), keeping seven clean sheets in eight matches; they have scored 22 times and conceded only twice across these games.
• This is Arsenal's 16th quarter-final tie in major European competition, progressing from nine of the previous 15, including each of the last two - versus CSKA Moscow in 2017-18 and Napoli in 2018-19, both in this competition.
• 15 different players have scored for Arsenal in the UEFA Europa League this season (own goals excluded), the most unique scorers of any side this season; the only side to have more different players score for them in a single UEFA Europa League campaign were Arsenal in 2017-18 (16).

Slavia Prague

• Slavia Prague will become the first team to face three British opponents (Leicester, Rangers and Arsenal) in the knockout rounds of a UEFA European competition since AC Milan in the 2006-07 Champions League (Celtic, Man Utd and Liverpool).
• Kudela has continued to represent Slavia Prague amid allegations of racism, but the 34-year-old has come down with a bout of illness and will not play this week, although a provisional one-match ban handed to him by UEFA would have ruled him out anyway.
• Slavia are short of centre-back options with Simon Deli and David Hovorka also unavailable, but highly-rated winger Abdallah Sima, who has scored four goals in this season's tournament, is available despite a domestic suspension.
• Eighteen-year-old goalkeeper Matyas Vagner was given his marching orders after just 18 minutes at the weekend, but the teenager should start in goal again here as first-choice Ondrej Kolar remains doubtful with a sinus fracture.