Djokovic overcomes Danish challenge to enter US Open second round
New York: Serbia's world No. 1 Novak Djokovic reached the second round of the US Open with a 6-1, 6-7(5), 6-2, 6-1 win over Holger Vitus Nodskov Rune in two hours and 15 minutes even as the Danish teen suffered from cramps in the final two…