Bernhard Langer is a German former professional tennis player and current Mercedes Benz ambassador. He first came to prominence in the 1970s, winning several ATP singles titles and reaching world number one. He also reached two Grand Slam semifinals, including a win at the Australian Open in 1983. Langer retired from professional tennis in 1991, later becoming a coach and occasional commentator. He has since been known as an advocate of healthy living, and has written several books on the topic.