Serbia took a 2-0 lead over Sweden in the first round of the Davis Cup on Friday after Janko Tipsarevic defeated Filip Prpic and Viktor Troicki beat Michael Ryderstedt. The ninth-ranked Tipsarevic had 11 aces and converted four of five break points to beat Prpic 6-3, 6-3, 6-4 in the best-of-five World Group series. More...