In the most prestigious club competition at European level, the FBs and the WBs had outstanding performances during the entire tournament.
| Player | Rating | Defense | Minutes Played | Team |
| Benjamin Pavard | 8.61 | Back 5 | 270 | Bayern Munich |
| João Cancelo | 8.37 | Back 4 | 840 | Manchester City |
| Alphonso Davies | 8.09 | Back 4 | 471 | Bayern Munich |
| Trent Alexander-Arnold | 8.03 | Back 4 | 791 | Liverpool |
| Douglas Santos | 7.93 | Back 5 | 353 | Zenit |
| Danilo | 7.66 | Back 4 | 270 | Juventus |
| Noussair Mazraoui | 7.65 | Back 4 | 657 | Ajax |
| Reinildo Mandava | 7.47 | Back 4 | 450 | Lille |
| Andrew Robertson | 7.43 | Back 4 | 826 | Liverpool |
| Kostas Tsimikas | 7.33 | Back 4 | 344 | Liverpool |
| Marcos Acuña | 7.30 | Back 4 | 378 | Sevilla |
| Daley Blind | 7.19 | Back 4 | 571 | Ajax |
| Alex Telles | 7.15 | Back 4 | 292 | Manchester United |
| Reece James | 7.15 | Back 5 | 296 | Chelsea |
| Álex Grimaldo | 7.14 | Back 4 | 360 | Benfica |
| César Azpilicueta | 7.07 | Back 5 | 505 | Chelsea |
| Alex Sandro | 7.06 | Back 4 | 507 | Juventus |
| Gilberto | 7.06 | Back 5 | 356 | Benfica |
| Dani Carvajal | 7.00 | Back 4 | 955 | Real Madrid |
Conditions for the presented data:
– Minimum minutes played in the competition: 270 minutes (equivalent to 3 full games) per type of defense played (Back 4 or Back 5);
– CL Qualifying Round data excluded;
Data from FBref.