Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Season | Competition | Round | Club | Score |
| --- | --- | --- | --- | --- |
| 1967/1968 | Inter-Cities Fairs Cup | 1st round | Rangers F.C. | 1:1, 1:2 |
| 1970/1971 | Inter-Cities Fairs Cup | 1st round | FK Partizan | 0:0, 6:0 |
| 1970/1971 | Inter-Cities Fairs Cup | 2nd round | Leeds United | 0:1, 2:1 |
| 1971/1972 | European Clubs' Champions Cup | 1st round | Ajax Amsterdam | 0:2, 0:0 |
| 1972/1973 | UEFA Cup | 1st round | VÖEST Linz | 2:0, 2:2 |
| 1972/1973 | UEFA Cup | 2nd round | Ruch Chorzów | 1:0, 3:0 |
| 1972/1973 | UEFA Cup | Last 16 | FC Porto | 2:1, 1:0 |
| 1972/1973 | UEFA Cup | Quarter final | Liverpool | 0:2, 0:1 |
| 1973/1974 | European Clubs' Champions Cup | 1st round | Juventus | 2:0, 2:3 |
| 1973/1974 | European Clubs' Champions Cup | Last 16 | Bayern Munich | 3:4, 3:3 |
| 1974/1975 | UEFA Cup | 1st round | Randers Freja | 1:1, 0:0 |
| 1974/1975 | UEFA Cup | 2nd round | Dynamo Moscow | 1:0, 0:1 (4:3 a.p.) |
| 1974/1975 | UEFA Cup | Last 16 | Hamburger SV | 1:4, 2:2 |
| 1975/1976 | UEFA Cup | 1st round | ASA Târgu Mures | 2:2, 4:1 |
| 1975/1976 | UEFA Cup | 2nd round | Budapest Honvéd FC | 2:2, 3:0 |
| 1975/1976 | UEFA Cup | Last 16 | Torpedo Moscow | 3:0, 1:1 |
| 1975/1976 | UEFA Cup | Quarter final | Liverpool | 0:0, 1:2 |
| 1976/1977 | European Clubs' Champions Cup | 1st round | S.L. Benfica | 2:0, 0:0 |
| 1976/1977 | European Clubs' Champions Cup | Last 16 | Ferencvaros | 0:1, 4:0 |
| 1976/1977 | European Clubs' Champions Cup | Quarter final | FC Zürich | 1:2, 3:2 |
| 1977/1978 | European Clubs' Champions Cup | 1st round | Halmstads BK | 2:0, 1:2 |
| 1977/1978 | European Clubs' Champions Cup | Last 16 | Liverpool | 1:5, 2:1 |
| 1978/1979 | European Clubs' Champions Cup | 1st round | FK Partizan | 0:2, 2:0 (5:4 a.p.) |
| 1978/1979 | European Clubs' Champions Cup | Last 16 | Bohemian F.C. | 0:0, 6:0 |
| 1978/1979 | European Clubs' Champions Cup | Quarter final | FK Austria Wien | 1:3, 1:0 |
| 1979/1980 | UEFA Cup | 1st round | Atlético Madrid | 2:1, 3:0 |
| 1979/1980 | UEFA Cup | 2nd round | VfB Stuttgart | 1:1, 0:0 |
| 1980/1981 | UEFA Cup | 1st round | FK Napredak Kruševac | 1:0, 1:0 |
| 1980/1981 | UEFA Cup | 2nd round | FC Twente | 1:1, 0:0 |
| 1980/1981 | UEFA Cup | Last 16 | Standard Liège | 1:1, 1:4 |
| 1981/1982 | UEFA Cup | 1st round | Zenit Leningrad | 2:1, 4:1 |
| 1981/1982 | UEFA Cup | 2nd round | Feyenoord Rotterdam | 1:2, 1:1 |
| 1982/1983 | UEFA Cup Winners' Cup | 1st round | B93 Kopenhagen | 2:0, 1:5 |
| 1984/1985 | UEFA Cup Winners' Cup | 1st round | Malmö FF | 0:2, 4:1 |
| 1984/1985 | UEFA Cup Winners' Cup | Last 16 | FC Metz | 3:1, 0:0 |
| 1984/1985 | UEFA Cup Winners' Cup | Quarter final | SK Rapid Wien | 3:0, 0:5 |
| 1985/1986 | UEFA Cup Winners' Cup | 1st round | Cercle Brugge | 2:3, 2:1 |
| 1985/1986 | UEFA Cup Winners' Cup | Last 16 | HJK Helsinki | 0:1, 7:2 |
| 1985/1986 | UEFA Cup Winners' Cup | Quarter final | Bayer Uerdingen | 2:0, 3:7 |
| 1987/1988 | UEFA Cup | 1st round | Spartak Moscow | 0:3, 1:0 |
| 1988/1989 | UEFA Cup | 1st round | Aberdeen | 0:0, 2:0 |
| 1988/1989 | UEFA Cup | 2nd round | K.S.V. Waregem | 4:1, 1:2 |
| 1988/1989 | UEFA Cup | Last 16 | AS Roma | 2–0, 2–0 |
| 1988/1989 | UEFA Cup | Quarter final | Victoria Bucuresti | 1:1, 4:0 |
| 1988/1989 | UEFA Cup | Semi-final | VfB Stuttgart | 0:1, 1:1 |
| 1989/1990 | European Clubs' Champions Cup | 1st round | AEK Athens FC | 1:0, 3:5 |
| 1990/1991 | European Clubs' Champions Cup | 1st round | Union Luxembourg | 3:1, 3:0 |
| 1990/1991 | European Clubs' Champions Cup | Last 16 | Malmö FF | 1:1, 1:1 (5:4 a.p.) |
| 1990/1991 | European Clubs' Champions Cup | Quarter final | Red Star Belgrade | 0:3, 0:3 (match abandoned) |
Question:
Which competition features the 1st round of Club Union Luxembourg?
Answer:
European Clubs' Champions Cup