I didn't find anything for this season, but Anan Khalaili had the most tackles by a Union Saint-Gilloise player in the Champions League in 2025-26, with 34 tackles.
| NAME | TKL | SEASON | CLUB | Rating | M | MIN | START | G | G/M | A | G+A | PK | FK | SH | SOT | WOOD | TCH | TCH-BOX | OFF | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | A. Khalaili | 34 | 2025-26 | 6.58 | 8 | 701 | 8 | 3 | 0.38 | 0 | 3 | 0 | 0 | 10 | 4 | 0 | 423 | 13 | 1 | |
| 2 | | K. Mac Allister | 29 | 2025-26 | 6.61 | 8 | 696 | 8 | 1 | 0.13 | 0 | 1 | 0 | 0 | 4 | 1 | 0 | 382 | 11 | 2 | |
| 3 | | K. Van De Perre | 27 | 2025-26 | 6.19 | 8 | 596 | 7 | 0 | 0.00 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 349 | 3 | 0 | |
| 4 | | A. Zorgane | 16 | 2025-26 | 6.73 | 8 | 670 | 8 | 0 | 0.00 | 1 | 1 | 0 | 0 | 5 | 4 | 0 | 499 | 4 | 0 | |
| 5 | | F. Leysen | 15 | 2025-26 | 6.21 | 7 | 386 | 4 | 0 | 0.00 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 243 | 1 | 0 | |
| 6 | | O. Niang | 13 | 2025-26 | 5.68 | 7 | 528 | 6 | 0 | 0.00 | 0 | 0 | 0 | 0 | 10 | 2 | 0 | 270 | 17 | 7 | |
| 7 | | C. Burgess | 12 | 2025-26 | 6.56 | 8 | 720 | 8 | 0 | 0.00 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 406 | 8 | 1 | |
| 8 | | R. Sykes | 9 | 2025-26 | 6.95 | 6 | 385 | 4 | 1 | 0.17 | 0 | 1 | 0 | 0 | 3 | 1 | 1 | 218 | 6 | 0 | |
| 9 | | L. Patris | 9 | 2025-26 | 6.75 | 5 | 149 | 1 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 84 | 2 | 0 | |
| 10 | | A. Ait El Hadj | 8 | 2025-26 | 6.87 | 7 | 522 | 7 | 1 | 0.14 | 1 | 2 | 0 | 0 | 7 | 3 | 0 | 262 | 12 | 1 | |
| 11 | | K. Rodríguez | 5 | 2025-26 | 6.15 | 6 | 376 | 4 | 0 | 0.00 | 1 | 1 | 0 | 0 | 10 | 5 | 0 | 176 | 20 | 5 | |
| 12 | | R. Schoofs | 4 | 2025-26 | 6.53 | 7 | 195 | 2 | 0 | 0.00 | 1 | 1 | 0 | 0 | 3 | 0 | 0 | 103 | 2 | 1 | |
| 13 | | M. Giger | 4 | 2025-26 | 6.71 | 5 | 125 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 3 | 1 | 0 | 66 | 3 | 0 | |
| 14 | | S. Boufal | 3 | 2025-26 | 6.81 | 4 | 82 | 0 | 0 | 0.00 | 1 | 1 | 0 | 0 | 3 | 3 | 0 | 58 | 3 | 1 | |
| 15 | | R. Florucz | 3 | 2025-26 | 6.57 | 5 | 285 | 4 | 0 | 0.00 | 0 | 0 | 0 | 0 | 7 | 3 | 0 | 112 | 20 | 2 | |
| 16 | | G. Smith | 2 | 2025-26 | 6.48 | 2 | 150 | 2 | 0 | 0.00 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 60 | 3 | 0 | |
| 17 |  | P. David | 2 | 2025-26 | 6.38 | 7 | 367 | 5 | 2 | 0.29 | 0 | 2 | 1 | 0 | 16 | 8 | 0 | 107 | 21 | 7 | |
| 18 | | M. Rasmussen | 2 | 2025-26 | 7.05 | 5 | 200 | 2 | 0 | 0.00 | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 128 | 1 | 0 |
Union SGStatMuse has Champions League data for tackles going back to the 2015-16 season.