Chris was my first tennis love, but it was Martina who broke my heart. What a joy to watch these legends still fighting on, says Guardian columnist Emma Brockes

Titans of the tennis world, Chris Evert and Martina Navratilova were once fearsome foes - each winning 18 Grand Slam titles. But they took on their biggest battle hand in hand

Evert and Navratilova shared one of the seminal rivalries and friendships in sports history. Then they needed each other more than ever.