Quarterback Tom Brady and Super Model Gisele Bundchen are. So are Tennis great Serena Williams and Reddit founder Alexis Ohanian. Then there is golf icon Tiger Woods and ski champion Lindsey Vonn, as well as Olympian greats Nadia Comaneci and Bart Connor. These are Sports’ Power Couples, a duo of envious capabilities and qualities that will cause entire rooms to turn heads.

But perhaps the greatest sports power couple of all time is the love match of tennis legends, Andre Agassi and Steffi Graf.

Andre Agassi, the charismatic, enigmatic tennis tour de force of the 1990s and oughts is one of 8 men to have a career grand slam, having won eight grand slam titles over the course of the four major tournaments: the Australian Open, the French Open, Wimbledon and the US Open. To win the biggest tournaments on three different surfaces – hard court, grass and clay – is a testament to versatility and greatness. Additionally, Agassi won gold in men’s singles tennis at the 1996 Olympic Games in Atlanta, thus making him the first and only man to earn the informal title of Career Golden Slam, until Rafael Nadal accomplished that with combined Olympic victory in 2008, and US Open victory in 2010.

Steffi Graf tops the accomplishments of her husband. The German superstar of the 1980s and 1990s is arguably the greatest female tennis player of all time. Over her career, Graf has won 22 Grand Slam singles titles (tied with Serena Williams), and in one incredible year, she pulled off a purist’s dream. In 1988, Graf won the Australian, the French, Wimbledon and the US Open, capping it off by winning the gold medal in women’s singles at the 1988 Seoul Olympics.

A Golden Slam. Until Steffi Graf, no one, man or woman, had ever done that.