Who is the other tennis player along with Nadal that has won at least two Grand Slam titles on three different surfaces?
| Options: |
| A) Novak Djokovic B) Mats Wilander C) Juan Martín del Potro D) Roger Federer |
| Answer : Mats Wilander |
| Options: |
| A) Novak Djokovic B) Mats Wilander C) Juan Martín del Potro D) Roger Federer |
| Answer : Mats Wilander |