Performance
| Club (# of participations) | 21–22 | 22–23 | 23–24 | 24–25 | |
|---|---|---|---|---|---|
 BELGIUM (9) | (1) | (2) | (4) | (2) | |
| 1 | Gent (4) [1] | R16 | QF | KO | KO |
| 2 | Anderlecht (1) [2] | • | QF | • | • |
| 3 | Club Brugge (1) [3] | • | • | SF | • |
| 4 | Genk (1) [4] | • | • | GS | • |
| 5 | Union Saint-Gilloise (1) [5] | • | • | R16 | • |
| 6 | Cercle Brugge (1) [6] | • | • | • | |
 CZECH REPUBLIC (7) | (3) | (2) | (1) | (1) | |
| 1 | Slavia Prague (2) [7] | QF | GS | • | • |
| 2 | Jablonec (1) [8] | GS | • | • | • |
| 3 | Sparta Prague (1) [9] | KO | • | • | • |
| 4 | Slovácko (1) [10] | • | GS | • | • |
| 5 | Viktoria Plzeň (1) [11] | • | • | QF | • |
| 6 | Mladá Boleslav (1) [12] | • | • | • | LP |
 CYPRUS (7) | (2) | (2) | (0) | (3) | |
| 1 | Omonia (2) [13] | GS | • | • | KO |
| 2 | Anorthosis (1) [14] | GS | • | • | • |
| 3 | Apollon Limassol (1) [15] | • | GS | • | • |
| 4 | AEK Larnaca (1) [16] | • | R16 | • | • |
| 5 | APOEL (1) [17] | • | • | • | KO |
| 6 | Pafos (1) [18] | • | • | • | |
 NETHERLANDS (7) | (4) | (1) | (2) | (0) | |
| 1 | AZ (3) [19] | R16 | SF | GS | • |
| 2 | Feyenoord (1) [20] | F | • | • | • |
| 3 | Vitesse (1) [21] | R16 | • | • | • |
| 4 | PSV Eindhoven (1) [22] | QF | • | • | • |
| 5 | Ajax (1) [23] | • | • | R16 | • |
 TURKEY (7) | (1) | (3) | (2) | (1) | |
| 1 | Fenerbahçe (2) [24] | KO | • | QF | • |
| 2 | İstanbul Başakşehir (2) [25] | • | R16 | • | LP |
| 3 | Sivasspor (1) [26] | • | R16 | • | • |
| 4 | Trabzonspor (1) [27] | • | KO | • | • |
| 5 | Beşiktaş (1) [28] | • | • | GS | • |
 DENMARK (6) | (3) | (1) | (1) | (1) | |
| 1 | Copenhagen (2) [29] | R16 | • | • | |
| 2 | Randers (1) [30] | KO | • | • | • |
| 3 | Midtjylland (1) [31] | KO | • | • | • |
| 4 | Silkeborg (1) [32] | • | GS | • | • |
| 5 | Nordsjælland (1) [33] | • | • | GS | • |
 AUSTRIA (6) | (2) | (1) | (1) | (2) | |
| 1 | LASK (2) [34] | R16 | • | • | LP |
| 2 | Rapid Wien (2) [35] | KO | • | • | |
| 3 | Austria Wien (1) [36] | • | GS | • | • |
| 4 | Sturm Graz (1) [37] | • | • | R16 | • |
 SWITZERLAND (6) | (1) | (1) | (2) | (2) | |
| 1 | Basel (2) [38] | R16 | SF | • | • |
| 2 | Lugano (2) [39] | • | • | GS | |
| 3 | Servette (1) [40] | • | • | R16 | • |
| 4 | St. Gallen (1) [41] | • | • | • | LP |
 NORWAY (6) | (1) | (2) | (2) | (1) | |
| 1 | Bodø/Glimt (3) [42] | QF | KO | KO | • |
| 2 | Molde (3) [43] | • | GS | R16 | |
 ENGLAND (5) | (2) | (1) | (1) | (1) | |
| 1 | Leicester City (1) [44] | SF | • | • | • |
| 2 | Tottenham Hotspur (1) [45] | GS | • | • | • |
| 3 | West Ham United (1) [46] | • | C | • | • |
| 4 | Aston Villa (1) [47] | • | • | SF | • |
| 5 | Chelsea (1) [48] | • | • | • | |
 ISRAEL (5) | (2) | (1) | (2) | (0) | |
| 1 | Maccabi Tel Aviv (2) [49] | KO | • | R16 | • |
| 2 | Maccabi Haifa (2) [50] | GS | • | R16 | • |
| 3 | Hapoel Be'er Sheva (1) [51] | • | GS | • | • |
 ITALY (5) | (1) | (2) | (1) | (1) | |
| 1 | Fiorentina (3) [52] | • | F | F | |
| 2 | Roma (1) [53] | C | • | • | • |
| 3 | Lazio (1) [54] | • | R16 | • | • |
 FRANCE (4) | (2) | (1) | (1) | (0) | |
| 1 | Marseille (1) [55] | SF | • | • | • |
| 2 | Rennes (1) [56] | R16 | • | • | • |
| 3 | Nice (1) [57] | • | QF | • | • |
| 4 | Lille (1) [58] | • | • | QF | • |
 GERMANY (4) | (1) | (1) | (1) | (1) | |
| 1 | Union Berlin (1) [59] | GS | • | • | • |
| 2 | 1. FC Köln (1) [60] | • | GS | • | • |
| 3 | Eintracht Frankfurt (1) [61] | • | • | KO | • |
| 4 | 1. FC Heidenheim (1) [62] | • | • | • | KO |
| Club (# of participations) | 21–22 | 22–23 | 23–24 | 24–25 | |
 SERBIA (4) | (1) | (1) | (1) | (1) | |
| 1 | Partizan (2) [63] | R16 | KO | • | • |
| 2 | Čukarički (1) [64] | • | • | GS | • |
| 3 | TSC (1) [65] | • | • | • | KO |
 SCOTLAND (4) | (1) | (1) | (1) | (1) | |
| 1 | Heart of Midlothian (2) [66] | • | GS | • | LP |
| 2 | Celtic (1) [67] | KO | • | • | • |
| 3 | Aberdeen (1) [68] | • | • | GS | • |
 GREECE (4) | (1) | (0) | (2) | (1) | |
| 1 | PAOK (2) [69] | QF | • | QF | • |
| 2 | Olympiacos (1) [70] | • | • | C | • |
| 3 | Panathinaikos (1) [71] | • | • | • | |
 SLOVENIA (4) | (1) | (0) | (1) | (2) | |
| 1 | Olimpija Ljubljana (2) [72] | • | • | GS | KO |
| 2 | Mura (1) [73] | GS | • | • | • |
| 3 | Celje (1) [74] | • | • | • | |
 POLAND (4) | (0) | (1) | (1) | (2) | |
| 1 | Legia Warsaw (2) [75] | • | • | KO | |
| 2 | Lech Poznań (1) [76] | • | QF | • | • |
| 3 | Jagiellonia Białystok (1) [77] | • | • | • | |
 SLOVAKIA (4) | (1) | (1) | (2) | (0) | |
| 1 | Slovan Bratislava (3) [78] | GS | R16 | KO | • |
| 2 | Spartak Trnava (1) [79] | • | • | GS | • |
 ARMENIA (3) | (1) | (1) | (0) | (1) | |
| 1 | Alashkert (1) [80] | GS | • | • | • |
| 2 | Pyunik (1) [81] | • | GS | • | • |
| 3 | Noah (1) [82] | • | • | • | LP |
 ROMANIA (3) | (1) | (2) | (0) | (0) | |
| 1 | CFR Cluj (2) [83] | GS | KO | • | • |
| 2 | FCSB (1) [84] | • | GS | • | • |
 UKRAINE (3) | (1) | (1) | (1) | (0) | |
| 1 | Zorya Luhansk (2) [85] | GS | • | GS | • |
| 2 | Dnipro-1 (1) [86] | • | KO | • | • |
 BULGARIA (3) | (1) | (1) | (1) | (0) | |
| 1 | Ludogorets Razgrad (2) [87] | • | KO | KO | • |
| 2 | CSKA Sofia (1) [88] | GS | • | • | • |
 KAZAKHSTAN (3) | (1) | (0) | (1) | (1) | |
| 1 | Astana (2) [89] | • | • | GS | LP |
| 2 | Kairat (1) [90] | GS | • | • | • |
 SPAIN (3) | (0) | (1) | (1) | (1) | |
| 1 | Real Betis (2) [91] | • | • | KO | |
| 2 | Villarreal (1) [92] | • | R16 | • | • |
 FINLAND (3) | (1) | (0) | (1) | (1) | |
| 1 | HJK (3) [93] | GS | • | GS | LP |
 MOLDOVA (2) | (0) | (1) | (0) | (1) | |
| 1 | Sheriff Tiraspol (1) [94] | • | R16 | • | • |
| 2 | Petrocub Hîncești (1) [95] | • | • | • | LP |
 PORTUGAL (2) | (0) | (1) | (0) | (1) | |
| 1 | Braga (1) [96] | • | KO | • | • |
| 2 | Vitória de Guimarães (1) [97] | • | • | • | |
 BOSNIA AND HERZEGOVINA (2) | (0) | (0) | (1) | (1) | |
| 1 | Zrinjski Mostar (1) [98] | • | • | GS | • |
| 2 | Borac Banja Luka (1) [99] | • | • | • | |
 ICELAND (2) | (0) | (0) | (1) | (1) | |
| 1 | Breiðablik (1) [100] | • | • | GS | • |
| 2 | Víkingur Reykjavík (1) [101] | • | • | • | KO |
 AZERBAIJAN (2) | (1) | (1) | (0) | (0) | |
| 1 | Qarabağ (2) [102] | KO | KO | • | • |
 KOSOVO (2) | (0) | (1) | (1) | (0) | |
| 1 | Ballkani (2) [103] | • | GS | GS | • |
 SWEDEN (2) | (0) | (1) | (0) | (1) | |
| 1 | Djurgården (2) [104] | • | R16 | • | |
 REPUBLIC OF IRELAND (2) | (0) | (1) | (0) | (1) | |
| 1 | Shamrock Rovers (2) [105] | • | GS | • | KO |
 ESTONIA (1) | (1) | (0) | (0) | (0) | |
| 1 | Flora (1) [106] | GS | • | • | • |
 GIBRALTAR (1) | (1) | (0) | (0) | (0) | |
| 1 | Lincoln Red Imps (1) [107] | GS | • | • | • |
 LITHUANIA (1) | (0) | (1) | (0) | (0) | |
| 1 | Žalgiris (1) [108] | • | GS | • | • |
 LATVIA (1) | (0) | (1) | (0) | (0) | |
| 1 | RFS (1) [109] | • | GS | • | • |
 LIECHTENSTEIN (1) | (0) | (1) | (0) | (0) | |
| 1 | Vaduz (1) [110] | • | GS | • | • |
 CROATIA (1) | (0) | (0) | (1) | (0) | |
| 1 | Dinamo Zagreb (1) [111] | • | • | R16 | • |
 HUNGARY (1) | (0) | (0) | (1) | (0) | |
| 1 | Ferencváros (1) [112] | • | • | KO | • |
 FAROE ISLANDS (1) | (0) | (0) | (1) | (0) | |
| 1 | KÍ (1) [113] | • | • | GS | • |
 BELARUS (1) | (0) | (0) | (0) | (1) | |
| 1 | Dinamo Minsk (1) [114] | • | • | • | LP |
 NORTHERN IRELAND (1) | (0) | (0) | (0) | (1) | |
| 1 | Larne (1) [115] | • | • | • | LP |
 WALES (1) | (0) | (0) | (0) | (1) | |
| 1 | The New Saints (1) [116] | • | • | • | LP |
| Club (# of participations) | 21–22 | 22–23 | 23–24 | 24–25 | |