Anna-Lena Grönefeld (born on June 4, 1985 in Nordhorn, then West Germany) is a professional tennis player from Germany. She turned professional in 2003. As of February 2006, she is the No. 1 tennis player from Germany. She was coached and trained by Rafael Font de Mora in Scottsdale, Arizona. In June, 2003 she captured the prestigious French Open Junior title, becoming the first player from Germany since 1957 to accomplish this feat. In 2002 she was the Singles Champion of both the Belgium and Frankfurt International Championships and a finalist at the Orange Bowl. In July 2003, she won the Apple and Eve Newsday Long Island Classic, held in Woodbury, New York, defeating Bethanie Mattek in the final. She is an accomplished doubles player winning the French Open title and reaching the finals at Wimbledon. As a result of her tennis successes in 2003, Grönefeld had achieved the Junior World ranking of #1 in singles and doubles. She launched her professional career début under the direction of the USA Academy and Rafael Font de Mora.

In 2006 she represented Germany along with Nicolas Kiefer at the Hopman Cup. She went on to win her first title in Acapulco, and completed a career best showing at Roland Garros, by reaching the quarterfinals, where she lost to Justine Henin. Her ranking peaked at 14. The good form was short-lived, as the German failed to progress beyond the quarterfinals of most remaining tournaments for the year. She split with Font de Mora in September 2006 and is currently coached by Dirk Dier.

Her run of bad form continued into 2007, and as of June 19, Groenefeld has been eliminated in the first round of her last five tournaments. Her ranking has subsequently dipped below the top 100 for the first time since 2004. On the 20th of August 2007, Groenefeld announced that she would be taking a break from the tour, coming back in 2008.

As of 11th February 2008, Groenefeld's ranking is 296 in the world.