The 25-year-old, who has a release clause in the region of £7m, joined Mainz from Real Madrid in 2010.
His performances have not gone unnoticed in Germany, however, with a number of sides believed to be interested in securing his services.
The forward will became Schalke's third signing of the summer transfer window.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | SC PaderbornSC Paderborn | 16 | 7 | 7 | 2 | 28 | 22 | 6 | 28 |
| 2 | Fortuna DusseldorfDusseldorf | 16 | 7 | 5 | 4 | 26 | 18 | 8 | 26 |
| 3 | Hannover | 15 | 8 | 2 | 5 | 22 | 16 | 6 | 26 |
| 4 | KaiserslauternKaiserslautern | 16 | 7 | 5 | 4 | 30 | 26 | 4 | 26 |
| 5 | Karlsruher SCKarlsruher | 16 | 7 | 5 | 4 | 32 | 30 | 2 | 26 |
| 6 | Hamburger SV | 16 | 6 | 7 | 3 | 34 | 23 | 11 | 25 |
| 7 | Elversberg | 15 | 7 | 4 | 4 | 27 | 18 | 9 | 25 |
| 8 | FC Koln | 15 | 7 | 4 | 4 | 28 | 22 | 6 | 25 |
| 9 | Magdeburg | 16 | 6 | 7 | 3 | 25 | 22 | 3 | 25 |
| 10 | SV Darmstadt 98Darmstadt | 16 | 6 | 6 | 4 | 35 | 27 | 8 | 24 |
| 11 | Hertha Berlin | 16 | 6 | 3 | 7 | 27 | 27 | 0 | 21 |
| 12 | Nuremberg | 15 | 5 | 4 | 6 | 29 | 27 | 2 | 19 |
| 13 | Schalke 04Schalke | 16 | 4 | 5 | 7 | 28 | 32 | -4 | 17 |
| 14 | Greuther Furth | 15 | 4 | 5 | 6 | 23 | 28 | -5 | 17 |
| 15 | Preussen Munster | 16 | 3 | 6 | 7 | 18 | 23 | -5 | 15 |
| 16 | SSV UlmUlm | 16 | 2 | 7 | 7 | 16 | 20 | -4 | 13 |
| 17 | Eintracht BraunschweigBraunschweig | 15 | 3 | 4 | 8 | 16 | 32 | -16 | 13 |
| 18 | Jahn RegensburgJahn | 16 | 2 | 2 | 12 | 7 | 38 | -31 | 8 |
| > 2.Bundesliga Full Table | |||||||||
