| Group J | 19/09/2019 | AS Roma | - | İstanbul Başakşehir | 4:0 | ||||
| Group J | 03/10/2019 | İstanbul Başakşehir | - | Bor. Mönchengladbach | 1:1 | ||||
| Group J | 12/12/2019 | Bor. Mönchengladbach | - | İstanbul Başakşehir | 1:2 | ||||
| Round of 32 | 20/02/2020 | Sporting CP | - | İstanbul Başakşehir | 3:1 | ||||
| Round of 32 | 27/02/2020 | İstanbul Başakşehir | - | Sporting CP | 4:1 aet |  |
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| Round of 16 | 12/03/2020 | İstanbul Başakşehir | - | FC København | 1:0 | ||||
| Round of 16 | 05/08/2020 | FC København | - | İstanbul Başakşehir | 3:0 |
Croatia