The 27-year-old's current contract with the German club runs out in June 2014.
"Yes, I am working towards [extending the current contract]," he said.
"First of all, we have to make sure that we are successful in the current season, but if we reach our goals, the future will be good as well."
Diego returned to Wolfsburg in the summer after playing on loan for Atletico Madrid last season.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Bayern MunichBayern | 11 | 9 | 2 | 0 | 36 | 7 | 29 | 29 |
| 2 | Eintracht FrankfurtFrankfurt | 11 | 7 | 2 | 2 | 27 | 16 | 11 | 23 |
| 3 | RB Leipzig | 11 | 6 | 3 | 2 | 18 | 9 | 9 | 21 |
| 4 | Bayer LeverkusenB. Leverkusen | 11 | 5 | 5 | 1 | 26 | 18 | 8 | 20 |
| 5 | Borussia DortmundDortmund | 11 | 6 | 1 | 4 | 22 | 18 | 4 | 19 |
| 6 | Borussia MonchengladbachBorussia M'bach | 11 | 5 | 2 | 4 | 17 | 14 | 3 | 17 |
| 7 | Freiburg | 11 | 5 | 2 | 4 | 13 | 15 | -2 | 17 |
| 8 | Mainz 05Mainz | 11 | 4 | 4 | 3 | 18 | 14 | 4 | 16 |
| 9 | Stuttgart | 11 | 4 | 4 | 3 | 21 | 19 | 2 | 16 |
| 10 | Union BerlinUnion Berlin | 11 | 4 | 4 | 3 | 9 | 9 | 0 | 16 |
| 11 | Wolfsburg | 11 | 4 | 3 | 4 | 20 | 18 | 2 | 15 |
| 12 | Werder Bremen | 11 | 4 | 3 | 4 | 17 | 22 | -5 | 15 |
| 13 | Hoffenheim | 11 | 3 | 3 | 5 | 17 | 22 | -5 | 12 |
| 14 | Augsburg | 11 | 3 | 3 | 5 | 13 | 23 | -10 | 12 |
| 15 | Heidenheim | 11 | 3 | 1 | 7 | 15 | 20 | -5 | 10 |
| 16 | St Pauli | 11 | 2 | 2 | 7 | 7 | 14 | -7 | 8 |
| 17 | Holstein Kiel | 11 | 1 | 2 | 8 | 12 | 28 | -16 | 5 |
| 18 | VfL BochumVfL Bochum | 11 | 0 | 2 | 9 | 10 | 32 | -22 | 2 |
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