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 | Hannover | 12 | 7 | 1 | 4 | 16 | 10 | 6 | 22 |
| 2 | SC PaderbornSC Paderborn | 12 | 5 | 6 | 1 | 19 | 14 | 5 | 21 |
| 3 | Fortuna DusseldorfDusseldorf | 12 | 6 | 3 | 3 | 18 | 13 | 5 | 21 |
| 4 | Karlsruher SCKarlsruher | 12 | 5 | 5 | 2 | 23 | 20 | 3 | 20 |
| 5 | Hamburger SV | 12 | 5 | 4 | 3 | 26 | 17 | 9 | 19 |
| 6 | Elversberg | 12 | 5 | 4 | 3 | 22 | 14 | 8 | 19 |
| 7 | Nuremberg | 12 | 5 | 3 | 4 | 24 | 20 | 4 | 18 |
| 8 | FC Koln | 12 | 5 | 3 | 4 | 24 | 20 | 4 | 18 |
| 9 | Magdeburg | 12 | 4 | 6 | 2 | 20 | 17 | 3 | 18 |
| 10 | KaiserslauternKaiserslautern | 12 | 4 | 5 | 3 | 20 | 18 | 2 | 17 |
| 11 | Hertha Berlin | 12 | 5 | 2 | 5 | 20 | 20 | 0 | 17 |
| 12 | SV Darmstadt 98Darmstadt | 12 | 4 | 4 | 4 | 26 | 23 | 3 | 16 |
| 13 | Greuther Furth | 12 | 3 | 4 | 5 | 18 | 23 | -5 | 13 |
| 14 | Schalke 04Schalke | 12 | 3 | 3 | 6 | 21 | 24 | -3 | 12 |
| 15 | Eintracht BraunschweigBraunschweig | 12 | 3 | 3 | 6 | 14 | 24 | -10 | 12 |
| 16 | Preussen Munster | 12 | 2 | 5 | 5 | 15 | 19 | -4 | 11 |
| 17 | SSV UlmUlm | 12 | 2 | 4 | 6 | 10 | 13 | -3 | 10 |
| 18 | Jahn RegensburgJahn | 12 | 2 | 1 | 9 | 5 | 32 | -27 | 7 |
| > 2.Bundesliga Full Table | |||||||||
