http://www.tennisnow.com/ World No. 53 Viktor Troicki responds to the ITF's 18-month suspension for an anti-doping violation, and Roger Federer continues to struggle through his 2013 slump after a second round loss. Plus, Rafael Nadal takes one last vacation in Spain before US Open preparation. Like us on Facebook: http://www.facebook.com/tennisnow Follow us on Twitter: http://twitter.com/tennis_now