Rafael Nadal's knees play an integral part in his career Author:Jon WertheimPublish date:Sep 25, 2013Rafael Nadal is 61-3 since returning from a seven-month absence because of a knee injury.Bob Martin/SI Have a good week, everyone! Latest NewsNovak Djokovic Suffers Unexpected Defeat in Indian Wells vs. 20-Year-Old Luca NardiTennis Q&A: Anti-Doping Lawyer Howard Jacobs on Simona Halep’s CaseRafael Nadal Withdraws From Indian Wells Before Playing in First RoundMailbag: The Aftermath of Andrey Rublev’s On-Court Outburst and DefaultSimona Halep’s Ban Reduced: What It Means for Tennis’s Anti-Doping Policy