Season Competition Round Club 1st leg 2nd leg Aggregate 1960–61 UEFA Cup Winners' Cup QF Fiorentina 0–3 2–6 2–9 1986–87 UEFA Cup 1R Spartak Moscow 0–0 0–1 0–1 1989–90 European Cup 1R PSV 0–3 0–2 0–5 1990–91 UEFA Cup 1R MTK Budapest 1–1 2–1 3–2 2R Admira Wacker Viennaa 0–1 1–1 1–2 1992–93 European Cup Winners' Cup 1R Levski Sofia 1–2 1–0 2–2 2R Feyenoord 1–0 1–4 2–4 1997–98 UEFA Cup Winners' Cup 1R Slavia Prague 2–4 0–2 2–6 2010–11 UEFA Europa League 3Q Utrecht 0–1 1–3 1–4 2012–13 UEFA Europa League PO Genk 2–1 0–2 2–3 2014–15 UEFA Europa League 2Q St Johnstone 1–1 1–1 (aet) 2–2 (4–5 p.) 2016–17 UEFA Europa League 3Q Sassuolo 1–1 0–3 1–4 2017–18 UEFA Europa League 2Q Osijek 0–2 2–1 2–3 2018–19 UEFA Europa League 3Q Olympiacos 0–4 1–3 1–7 2019–20 UEFA Europa League 2Q KÍ Klaksvík 1–0 1–0 2–0 3Q Espanyol 0–3 0–3 0–6