Schalken is still to get past the third round of any Grand Slam, despite being a solid performer on the tour.
He has picked up six titles - but none this year, with his best a couple of quarter-final spots in Milan and Estoril.
The powerful Dutchman has shown good form in patches over the last few seasons, but his ranking has gone backwards this year.
He needs a good run here to arrest that slide and give him his confidence back.