I’ve been reminded of those moments while watching Tommy Haas and Kim Clijsters return to the court over the past week. Haas, 42, and Clijsters, 37, are still perfectly recognizable as people ...

Some of you may be surprised to know that Kim isn't the only Clijsters from Belgium. There's also Kim's sister, Elke Clijsters, who's 18 months younger and retired in 2004 because of various injuries.