Sjeng Schalken (born 8 September 1976 in Weert) is a former professional tennis player from the Netherlands.

A right-handed baseliner with a single-handed backhand, Schalken's game is characterised by his consistency of both wings and his continental technique on both the forehand and backhand. The latter is his major weapon, a rallying shot that is also capable of being struck for winners either cross-court or down the line. The player he admired most while growing up was Ivan Lendl.

Schalken is known for his placid on-court demeanour, seemingly reacting in the same manner whether trailing or leading. But as a junior and a young pro he had an explosive temper that, he has stated, hindered him in many matches and caused him to lose through not thinking clearly. Only in 1999 did he manage to suppress his emotional side while on court and develop a more level-headed temperament, although he was disqualified from the Nasdaq-100 Open in 2004 for verbally abusing the umpire.

Schalken turned tennis professional in 1994 having been an outstanding junior, winning the US Open junior event in 1994. He won his first career title on clay in Valencia at the age of 19, defeating Gilbert Schaller in the final. He was the youngest winner on tour for that year, 1995, and the next year as well when he defeated Younes El Aynaoui in the final in Jakarta for his second title. Schalken managed to win at least one ATP tournament eight out of nine years from 1995 to 2003, the sole exception being 1998.

Peter "Pete" Sampras (/ˈsæmprəs/; born August 12, 1971) is a retired Greek–American tennis player and former world number 1. During his 15-year tour career, he won 14 Grand Slam singles titles and became recognized as one of the greatest tennis players of all time.

Sampras debuted on the professional tour in 1988 and played his last top-level tournament in 2002 when he won the US Open, defeating rival Andre Agassi in the final. He was the year-end world no. 1 for six consecutive years (1993–1998), a record for the open era. His seven Wimbledon singles championships are also an Open Era record. He spent 286 weeks at no. 1, the most of any male player. His five US Open singles titles is an Open Era record shared with former world no. 1 players Jimmy Connors and Roger Federer. Sampras is the last American male to win Wimbledon (2000) and the ATP World Tour Finals (1999).

Paul Vincent Nicholas Haarhuis (born 19 February 1966) is a Dutch former professional tennis player. He is a former World No. 1 doubles player. He won six Grand Slam men's doubles titles, five with Jacco Eltingh and one with Yevgeny Kafelnikov.

Haarhuis was born on 19 February 1966 in Eindhoven in the Netherlands. He played tennis for Florida State University.

In June 1995, he reached his highest singles ranking of World No. 18. He is best remembered for his success in doubles with fellow countryman Jacco Eltingh, winning five Grand Slam titles together. In his career he has won one singles title and 54 doubles titles.

He is, together with Sergi Bruguera, Richard Krajicek, Leander Paes, and Michael Stich, the only player of the same generation with a positive head-to-head record against Pete Sampras: 3–1.

After retiring, he won the end of the year Blackrock Masters Tennis tournament in the Royal Albert Hall in 2005 and 2006, beating legends such as Goran Ivanišević and John McEnroe. He completed a hat-trick of victories in the tournament in 2007, beating Frenchman Guy Forget.

Johannes Martinus ("Jan") Siemerink (born 14 April 1970 in Rijnsburg, Zuid-Holland) is a former professional tennis player from the Netherlands.

As a junior player, Siemerink was the Dutch 18-under champion in 1988. He also won the doubles title at the 1988 Orange Bowl junior championship in Florida.

Siemerink turned professional in 1989. Over the course of his career he won four top-level singles titles (at Singapore in 1991, Nottingham in 1996, and at Rotterdam and Toulouse in 1998). He also won ten tour doubles titles, the most significant of which were the Miami Masters in 1993 and the Monte Carlo Masters in 1996.

Siemerink's best performance at a Grand Slam event came at Wimbledon in 1998, where he reached the quarterfinals before being knocked-out by Goran Ivanišević.

Siemerink played for the Netherlands in the Davis Cup between 1991 and 2001, compiling a 17–10 record. He helped the Netherlands reach the World Group semifinals in 2001.

Siemerink's career-high rankings were World No. 14 in singles (in 1998) and World No. 16 in doubles (in 1996). His career prize-money totaled $4,347,693.