2021 Illinois Fighting Illini Fourth Down Conversion Defense Split Stats through 01/10/2022
| Split | G | Attempts | Conversions | Conversion % |
|---|---|---|---|---|
| All Games | 12 | 18 | 13 | 72.22 |
| at Home | 7 | 11 | 9 | 81.82 |
| on Road/Neutral Site | 5 | 7 | 4 | 57.14 |
| in Wins | 5 | 10 | 6 | 60.00 |
| in Losses | 7 | 8 | 7 | 87.50 |
| vs. Conference | 9 | 17 | 12 | 70.59 |
| vs. Non-Conference | 3 | 1 | 1 | 100.00 |
| vs. Ranked (AP) | 1 | 2 | 1 | 50.00 |
| vs. Unranked (AP) | 11 | 16 | 12 | 75.00 |
| vs. FBS (I-A) | 12 | 18 | 13 | 72.22 |
| vs. FCS (I-AA) | 0 | 0 | 0 | - |
| vs. FBS Winning | 7 | 8 | 5 | 62.50 |
| vs. FBS Non-Winning | 5 | 10 | 8 | 80.00 |
| vs. FBS Power 5 | 10 | 18 | 13 | 72.22 |
| vs. FBS non-Power 5 | 2 | 0 | 0 | - |
| in August/September | 5 | 3 | 2 | 66.67 |
| in October | 4 | 6 | 6 | 100.00 |
| in November | 3 | 9 | 5 | 55.56 |
| in December/January | 0 | 0 | 0 | - |