Martina Navratilova is the latest tennis legend to dip her toes in coaching, as she announced on Monday afternoon that she would be working with world No. 6 Agnieszka Radwanska during the coming season.

Navratilova partnership with Aga is the latest in a long line in star coaching roles over the past few years; Andy Murray sparked the trend when he hired Ivan Lendl then Amelie Mauresmo; Novak Djokovic brought Boris Becker on board; Marin Cilic partnered with Goran Ivanisevic to win his maiden Grand Slam title; Roger Federer teamed up with his idol Stefan Edberg, while Kei Nishikori joined forces with Michael Chang.

Both the players announced the big news on twitter.

So happy to announce @Martina as the newest member of my coaching team!

— Aga Radwanska (@ARadwanska) December 8, 2014

Am very excited to be working with @ARadwanska and her team:), should be a fun ride!!!

— Martina Navratilova (@Martina) December 8, 2014

Navratilova won 167 WTA titles over the span of her illustrious career, 18 of which were Grand Slam singles titles and won her last Grand Slam mixed doubles title at the US Open in 2006. Her rivalry with Chris Evert goes down as one of the biggest rivalries in women’s tennis, having played each other a total of 80 times, with Navratilova leading the series 43-37.

Martina, a US citizen for well over three decades now, dedicates a significant portion of her time to her causes, such as supporting environmental issues, gay rights issues as well as animal rights abuses.