| Arsenal | Cardiff City | ||||
|---|---|---|---|---|---|
| GK | Bernd Leno | GK | Neil Etheridge | ||
| S2 | DR | Stephan Lichtsteiner | DR | Lee Peltier | |
| DR | Nacho Monreal | DR | Joe Bennett | ||
| DR | Sead Kolasinac | DR | Callum Paterson | ||
| DR | Shkodran Mustafi | DR | Bruno Ecuele Manga | ||
| S1 | MD | Mohamed Elneny | DR | Sol Bamba | |
| S3 | MD | Mesut Ozil | S3 | MD | Harry Arter |
| MD | Lucas Torreira | MD | Joe Ralls | ||
| MD | Matteo Guendouzi | MD | Aron Gunnarsson | ||
| FD | Alexandre Lacazette | S1 | MD | Bobby Reid | |
| FD | Pierre-Emerick Aubameyang | S2 | WR | Oumar Niasse | |
| Substitute | Substitute | ||||
| S1 | AM | Alex Iwobi | S1 | WR | Nathaniel Mendez-Laing |
| S2 | DR | Carl Jenkinson | S2 | FD | Kenneth Zohore |
| S3 | MD | Aaron Ramsey | S3 | AM | Kadeem Harris |
| Manager | Manager | ||||
| Unai Emery | Neil Warnock | ||||