Hall of Fame
Cilic, Del Potro, Wawrinka, and a few others are well past their prime. Watching Cilic today I honestly felt sorry for him. Sure he's still making good money but there's no way any of these 3 are going to win the big titles any longer. I'm certain they love the game, and it's hard to let go but sometimes it is just good sense to know when to say good bye.