Rafael Nadal: Knee pain meant I had to retire in semifinal Unknown 00:11 After retiring through injury at the U.S. Open, Rafael Nadal said he was simply in "too much pain" to continue his semifinal. Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsWomen's Asia Cup: India Beat Defending Champions Japan to Enter FinalNick Wright explains why the Houston Texans should've signed Colin Kaepernick 6 weeks agoTop Tweets: KAT kid is the Halloween MVPPatrice Evra Charged by UEFA for Kicking Fan Prior to Vitoria Clash
