The public rarely learns anything about the German tennis legend Steffi Graf: "I basically have little need for publicity," Graf told the German-language "Vogue" a few years ago when it featured her on the cover. But now the 54-year-old made an exception: her husband, the former tennis professional Andre Agassi, published a picture of Graf on Instagram in which she is standing on a longboard.

Agassi captioned the picture with just a red heart. The couple lives in the USA. The two have a son and a daughter. Steffi Graf dominated the tennis world in the late 1980s and 1990s. She won the English tournament at Wimbledon seven times. She also won 22 Grand Slam titles and was number one in the world tennis rankings for 377 weeks.

She is also the only player in the world to achieve a "Golden Slam" in 1988 - she won all four Grand Slam titles that year and won the gold medal at the Olympic Games tennis tournament.

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