The young defender is currently struggling with an ankle complaint that he suffered against Southampton at the weekend.
The Royals will also be without Russian frontman Pavel Pogrebnyak, who has picked up a muscular problem.
Alex McCarthy, Jimmy Kebe and Jem Karacan will also not make the trip to take on the Black Cats.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Birmingham CityBirmingham | 37 | 26 | 8 | 3 | 63 | 25 | 38 | 86 |
| 2 | Wrexham | 39 | 23 | 8 | 8 | 54 | 30 | 24 | 77 |
| 3 | Wycombe WanderersWycombe | 38 | 21 | 11 | 6 | 65 | 36 | 29 | 74 |
| 4 | Charlton AthleticCharlton | 39 | 20 | 9 | 10 | 53 | 35 | 18 | 69 |
| 5 | Stockport CountyStockport | 39 | 19 | 11 | 9 | 55 | 36 | 19 | 68 |
| 6 | Reading | 38 | 17 | 11 | 10 | 55 | 47 | 8 | 62 |
| 7 | Huddersfield TownHuddersfield | 38 | 18 | 7 | 13 | 52 | 38 | 14 | 61 |
| 8 | Bolton WanderersBolton | 38 | 18 | 6 | 14 | 60 | 57 | 3 | 60 |
| 9 | Leyton Orient | 38 | 18 | 5 | 15 | 54 | 38 | 16 | 59 |
| 10 | Blackpool | 39 | 14 | 15 | 10 | 59 | 51 | 8 | 57 |
| 11 | Barnsley | 39 | 15 | 9 | 15 | 53 | 55 | -2 | 54 |
| 12 | Lincoln CityLincoln | 39 | 13 | 11 | 15 | 53 | 46 | 7 | 50 |
| 13 | Stevenage | 38 | 13 | 10 | 15 | 35 | 39 | -4 | 49 |
| 14 | Mansfield TownMansfield | 38 | 13 | 8 | 17 | 45 | 52 | -7 | 47 |
| 15 | Peterborough UnitedPeterborough | 38 | 12 | 9 | 17 | 57 | 63 | -6 | 45 |
| 16 | Rotherham UnitedRotherham | 38 | 12 | 9 | 17 | 42 | 49 | -7 | 45 |
| 17 | Exeter CityExeter | 38 | 12 | 9 | 17 | 40 | 53 | -13 | 45 |
| 18 | Wigan AthleticWigan | 37 | 11 | 11 | 15 | 34 | 37 | -3 | 44 |
| 19 | Northampton TownNorthampton | 39 | 10 | 13 | 16 | 38 | 57 | -19 | 43 |
| 20 | Bristol Rovers | 39 | 12 | 6 | 21 | 40 | 63 | -23 | 42 |
| 21 | Burton Albion | 38 | 8 | 12 | 18 | 39 | 55 | -16 | 36 |
| 22 | Crawley TownCrawley | 39 | 9 | 9 | 21 | 44 | 71 | -27 | 36 |
| 23 | Cambridge UnitedCambridge | 39 | 7 | 10 | 22 | 37 | 63 | -26 | 31 |
| 24 | Shrewsbury TownShrewsbury | 38 | 7 | 7 | 24 | 35 | 66 | -31 | 28 |
| > League One Full Table | |||||||||
