| Player | Reason | From | Until | Days | Games missed |
|---|---|---|---|---|---|
 Unknown player | Doubtful | 1 Oct 2020 | 1 Oct 2020 | 0 | 1 |
 Unknown player | Doubtful | 1 Oct 2020 | 1 Oct 2020 | 0 | 1 |
 Unknown player | Groin Injury | 13 Sept 2020 | 27 Sept 2020 | 14 | 2 |
| Unknown player | Calf Injury | 11 Sept 2020 | 30 Sept 2020 | 19 | 4 |
 Unknown player | Neck Injury | 11 Sept 2020 | 18 Sept 2020 | 7 | 1 |
 Emile Smith Rowe | Shoulder Injury | 10 Sept 2020 | 10 Dec 2020 | 91 | 8 |
| Unknown player | Calf Injury | 30 Aug 2020 | 30 Sept 2020 | 31 | 4 |
 Unknown player | Doubtful | 26 Jul 2020 | 26 Jul 2020 | 0 | 1 |
 Unknown player | Muscle Injury | 19 Jul 2020 | 24 Oct 2020 | 97 | 13 |
 Nicolas Pépé | Muscle Fatigue | 2 Jul 2020 | 6 Jul 2020 | 4 | 1 |
 Unknown player | Fitness | 25 Jun 2020 | 7 Oct 2020 | 104 | — |
 Unknown player | Back Problems | 25 Jun 2020 | 3 Aug 2020 | 39 | 11 |
 Bernd Leno | Ligament Stretching | 21 Jun 2020 | 27 Aug 2020 | 67 | 12 |
 Unknown player | Knee Injury | 21 Jun 2020 | 18 Dec 2020 | 180 | 30 |
| Unknown player | Muscle Strain | 19 Jun 2020 | 24 Jun 2020 | 5 | 1 |
 Granit Xhaka | Ankle Injury | 18 Jun 2020 | 24 Jun 2020 | 6 | 1 |
| Unknown player | Broken Nose Bone | 17 Jun 2020 | 26 Jun 2020 | 9 | 2 |
 Unknown player | Ankle Injury | 15 Jun 2020 | 3 Dec 2020 | 171 | 31 |
 Unknown player | Ankle Injury | 3 Mar 2020 | 3 Jul 2020 | 122 | 6 |
| Unknown player | Muscle Strain | 29 Feb 2020 | 15 Mar 2020 | 15 | 2 |
 Sead Kolasinac | Arm Injury | 24 Feb 2020 | 15 Jun 2020 | 112 | 3 |
| Unknown player | Knock | 20 Feb 2020 | 25 Feb 2020 | 5 | 2 |
| Unknown player | ILL | 17 Feb 2020 | 21 Feb 2020 | 4 | 0 |
| Unknown player | Knee Injury | 21 Jan 2020 | 2 Mar 2020 | 41 | 7 |
| Unknown player | ILL | 17 Jan 2020 | 22 Jan 2020 | 5 | 1 |
| Sead Kolasinac | Muscle Strain | 15 Jan 2020 | 15 Feb 2020 | 31 | 4 |
| Unknown player | Hamstring Injury | 9 Jan 2020 | 24 Feb 2020 | 46 | 7 |
 Pierre-Emerick Aubameyang | Knock | 3 Jan 2020 | 10 Jan 2020 | 7 | 1 |
 Unknown player | Cruciate Ligament Tear | 29 Dec 2019 | 8 Nov 2020 | 315 | 41 |
| Unknown player | Concussion | 27 Dec 2019 | 30 Dec 2019 | 3 | 0 |
| Unknown player | Hamstring Injury | 23 Dec 2019 | 6 Jan 2020 | 14 | 3 |
| Unknown player | Ankle Injury | 16 Dec 2019 | 26 Dec 2019 | 10 | 1 |
| Sead Kolasinac | Ankle Injury | 16 Dec 2019 | 30 Dec 2019 | 14 | 2 |
| Nicolas Pépé | Knee Injury | 10 Dec 2019 | 14 Dec 2019 | 4 | 1 |
| Granit Xhaka | Concussion | 9 Dec 2019 | 17 Dec 2019 | 8 | 3 |
| Unknown player | Shoulder Injury | 9 Dec 2019 | 14 Mar 2020 | 96 | 19 |
 Héctor Bellerín | Hamstring Injury | 6 Dec 2019 | 14 Jan 2020 | 39 | 9 |
| Héctor Bellerín | Hamstring Injury | 24 Nov 2019 | 4 Dec 2019 | 10 | 2 |
| Sead Kolasinac | Hamstring Injury | 17 Nov 2019 | 30 Nov 2019 | 13 | 2 |
 Unknown player | Knee Injury | 10 Nov 2019 | 31 Dec 2019 | 51 | 10 |
 Dani Ceballos | Torn Muscle Bundle | 7 Nov 2019 | 31 Dec 2019 | 54 | 11 |
| Unknown player | Rest | 23 Oct 2019 | 25 Oct 2019 | 2 | 0 |
| Unknown player | Ankle Injury | 7 Oct 2019 | 25 Nov 2019 | 49 | 8 |
| Unknown player | Rest | 2 Oct 2019 | 4 Oct 2019 | 2 | 0 |
| Unknown player | Rest | 23 Sept 2019 | 25 Sept 2019 | 2 | 1 |
| Emile Smith Rowe | Head Injury | 23 Sept 2019 | 7 Oct 2019 | 14 | 1 |
| Unknown player | Rest | 18 Sept 2019 | 20 Sept 2019 | 2 | 1 |
 Unknown player | Ankle Injury | 2 Sept 2019 | 20 Oct 2019 | 48 | 7 |
| Unknown player | ILL | 12 Aug 2019 | 19 Aug 2019 | 7 | 1 |
| Granit Xhaka | Back Injury | 12 Aug 2019 | 23 Aug 2019 | 11 | 1 |
 Unknown player | Groin Injury | 8 Aug 2019 | 7 Oct 2019 | 60 | 10 |
| Emile Smith Rowe | Groin Injury | 8 Aug 2019 | 26 Nov 2019 | 110 | 0 |
| Unknown player | Rest | 11 May 2019 | 13 May 2019 | 2 | 0 |
| Pierre-Emerick Aubameyang | Nose Injury | 22 Apr 2019 | 27 Apr 2019 | 5 | 1 |
| Granit Xhaka | Bruised Ribs | 19 Apr 2019 | 23 Apr 2019 | 4 | 1 |
 Unknown player | Biceps Femoris Muscle Injury | 18 Apr 2019 | 26 Aug 2019 | 130 | 19 |
 Denis Suárez | Groin Injury | 12 Apr 2019 | 30 Jun 2019 | 79 | 10 |
| Granit Xhaka | Groin Injury | 28 Mar 2019 | 15 Apr 2019 | 18 | 3 |
 Unknown player | Foot Injury | 15 Mar 2019 | 14 Apr 2019 | 30 | 3 |
 Henrikh Mkhitaryan | Back Injury | 8 Mar 2019 | 23 Mar 2019 | 15 | 2 |
 Ainsley Maitland-Niles | ILL | 15 Feb 2019 | 1 Mar 2019 | 14 | 3 |
| Pierre-Emerick Aubameyang | ILL | 4 Feb 2019 | 23 Feb 2019 | 19 | 3 |
| Granit Xhaka | Groin Problems | 30 Jan 2019 | 23 Feb 2019 | 24 | 4 |
| Ainsley Maitland-Niles | Knee Injury | 26 Jan 2019 | 8 Feb 2019 | 13 | 2 |
| Unknown player | Ankle Injury | 26 Jan 2019 | 23 Feb 2019 | 28 | 5 |
| Unknown player | Facial Injury | 26 Jan 2019 | 1 Feb 2019 | 6 | 1 |
| Héctor Bellerín | Cruciate Ligament Tear | 19 Jan 2019 | 16 Sept 2019 | 240 | 37 |
| Emile Smith Rowe | Hamstring Injury | 14 Jan 2019 | 15 Apr 2019 | 91 | 0 |
| Unknown player | Knock | 2 Jan 2019 | 11 Jan 2019 | 9 | 1 |
| Unknown player | Knee Problems | 27 Dec 2018 | 14 Jan 2019 | 18 | 4 |
 Unknown player | Hamstring Injury | 23 Dec 2018 | 11 Jan 2019 | 19 | 4 |
| Henrikh Mkhitaryan | Metatarsal Fracture | 20 Dec 2018 | 7 Feb 2019 | 49 | 10 |
| Héctor Bellerín | Calf Injury | 16 Dec 2018 | 11 Jan 2019 | 26 | 7 |
| Unknown player | Rest | 12 Dec 2018 | 14 Dec 2018 | 2 | 0 |
| Sead Kolasinac | Muscle Strain | 12 Dec 2018 | 21 Dec 2018 | 9 | 3 |
| Unknown player | Hamstring Injury | 8 Dec 2018 | 29 Dec 2018 | 21 | 6 |
| Unknown player | Cruciate Ligament Tear | 5 Dec 2018 | 31 Aug 2019 | 269 | 47 |
| Emile Smith Rowe | Groin Problems | 29 Nov 2018 | 28 Feb 2019 | 91 | 1 |
| Unknown player | Back Problems | 29 Nov 2018 | 13 Dec 2018 | 14 | 4 |
| Unknown player | Rest | 28 Nov 2018 | 30 Nov 2018 | 2 | 0 |
| Unknown player | Groin Injury | 12 Nov 2018 | 1 Dec 2018 | 19 | 2 |
 Danny Welbeck | Ankle Injury | 9 Nov 2018 | 31 May 2019 | 203 | 41 |
 Unknown player | Hamstring Injury | 30 Oct 2018 | 24 Nov 2018 | 25 | 4 |
| Unknown player | Ankle Injury | 29 Oct 2018 | 7 Nov 2018 | 9 | 2 |
| Héctor Bellerín | Muscle Injury | 29 Oct 2018 | 2 Nov 2018 | 4 | 1 |
| Unknown player | Hamstring Injury | 21 Oct 2018 | 7 Dec 2018 | 47 | 11 |
| Sead Kolasinac | Hamstring Injury | 21 Oct 2018 | 2 Nov 2018 | 12 | 4 |
| Unknown player | Ankle Injury | 15 Oct 2018 | 24 Oct 2018 | 9 | 1 |
| Unknown player | Back Injury | 4 Oct 2018 | 22 Oct 2018 | 18 | 2 |
| Pierre-Emerick Aubameyang | ILL | 2 Oct 2018 | 6 Oct 2018 | 4 | 1 |
| Emile Smith Rowe | Bruised Ribs | 27 Sept 2018 | 4 Oct 2018 | 7 | 0 |
| Unknown player | Knock | 25 Sept 2018 | 28 Sept 2018 | 3 | 1 |
| Henrikh Mkhitaryan | Ankle Injury | 22 Sept 2018 | 28 Sept 2018 | 6 | 2 |
| Unknown player | Groin Injury | 10 Sept 2018 | 14 Jan 2019 | 126 | 27 |
 Alex Iwobi | ILL | 26 Aug 2018 | 19 Sept 2018 | 24 | 2 |
| Unknown player | ILL | 23 Aug 2018 | 3 Sept 2018 | 11 | 2 |
| Ainsley Maitland-Niles | Hairline Fracture In The Fibula | 16 Aug 2018 | 25 Oct 2018 | 70 | 11 |
 Unknown player | Ankle Injury | 13 Aug 2018 | 24 Oct 2018 | 72 | 11 |
| Sead Kolasinac | Knee Injury | 2 Aug 2018 | 25 Sept 2018 | 54 | 7 |
| Unknown player | Knee Injury | 2 Jul 2018 | 17 Aug 2018 | 46 | 5 |
