Schalken continues to be one of the most solid and consistent performers on the ATP Tour.
World ranking: 15
French Open best:
3rd round (2003, 2002, 1999)
2003: 3rd round
2002: 3rd round
2001: 2nd round
However, the Dutch number one is not at his best on clay and he has never gone beyond the third round at the French Open.
His best ever performance at a Grand Slam came at the US Open when he reached the last four in 2002, the first Dutchman to do so since 1971.
That run at the US Open, followed by a final in Moscow, helped Schalken to finish that year ranked 20th in the world.
And he continued to progress last season, reaching a career-high 11th in the rankings in April and winning two tournaments - on grass at home in Holland and on the hard-courts of Brazil.
He also reached the quarter-finals at Wimbledon, losing only to eventual champion Roger Federer.
Schalken may not be the most elegant of players - few look as awkward from the back of the court - but he is strong off both sides and has a huge serve.