At age of 15, Kim Clijsters reached at the juniors competition the number 2 position in the singles and the number 4 position in the doubles. (1998)

In 2001 she was the very first Belgian tennis player to reach the finals of a grand slam tournament (Roland Garros). After Roland Garros she was always in the final of a Grand Slam tournament, but unfortunately she always lost them. But hard work do pays off and so she won her first grand slam tournament, the US Open, four years later.

After this victory, the collaboration with her trainer, Marc De Hous, was ended, who said that they reached their goals and was looking for other challenges.

In mid-2006 Kim decided that she would stop at the end of the 2007 season. She had been struggling for two years with many injuries. However, after the Warsaw tournament, on 6 May 2007, she announced via her website that she would stop immediately and that she would not finish the season as a professional tennis player. 

She only returns that year to the tenniscourt for a double match for a charity event.

COMEBACK

On 26^th of March 2009, Clijsters announced that she would make her official comeback at the Cincinnati WTA tournament on the 10^th of August. To get back into the rhythm of tournaments, she played a number of demonstration competitions, including those at Wimbledon to celebrate the new extendable roof. In the singles and doubles against Steffi Graf and her husband André Agassi she won both matches. The demonstration matches thereafter, both the WTA tournament of Rosmalen and the Pro Leage in the American World Team Tennis, were also won and beautifully finished.

After these demonstration matches she played her first official competition after her comeback and she immediately reached the 3rd round.

Feeling good about her latest win she thereafter won the US Open in 2009 by beating Caroline Wozniacki in the final with 7-5 and 6-2. Because of this victory she came back in the top 20 of the WTA Ranking.

In 2010 she won the Brisbane WTA tournament by defeating Justine Henin in 3 sets. Clijsters became a big favorite for the final victory at the Australian Open, but in the third round, Nadja Petrova suddenly took over. A big loss in her professional career, but soon forgotten because she eventually won the title in Miami where she defeated Venus Williams in 2 sets.

At Wimbledon in 2010 she reached the quarterfinals which gave her a rise to 7th place on the WTA Ranking. Her highest ranking since her comeback, but there was still room for improvement and so she achieved the number 2 position, after victories at the tournament of Cincinnati (Aug 2010) and the victory at the Australian Open in January 2011.

NUMBER 1 WTA RANKING

In 2011, On February 11, Kim won the quarterfinals in Paris, which was making her the number one in the world again. From this moment you can certainly speak of a fantastic comeback. Thereby she is also the first mother to obtain a number 1 position at the WTA Ranking.

GOODBYE’S

Unfortunately after some injuries in the period after ,Kim did not win any more final prizes.

In December 2012 she decides to say her final goodbye’s to her fans in her own country with an invitational contest against Venus Williams, the “Kim's Thank You Games” at the Antwerp Sportpaleis. She won this competition and therefore can look back on a fantastic tennis career.

SECOND COMEBACK

In 2019 Kim announces her second comeback to professional women’s tennis after a seven-year hiatus.  After 20 months and being able to participate in five tournaments only due to COVID-19 and a knee injury, Kim decides to call it an and end. One last time.