In the U.S. Open Tennis, top seed Novak Djokovic beat the second seed Roger Federer to clinch the Men's Singles title.Djokovic defeated Federer 6-4, 5-7, 6-4, 6-4 the Men's Singles finals a shortwhile ago.Earlier rain had delayed the start of the final Monday morning.With this victory, Djokovic won his third grand slam crown of the year.Earlier, he also won the Australian Open and Wimbledon titles. India's tennis star Sania Mirza bagged her second consecutive Grand Slam title of the season, and fifth overall, as she won the US Open women's doubles with Swiss partner Martina Hingis, in New York.The top-seeded Indo-Swiss team outplayed the fourth seedAussie-Kazakh team of Casey Dellacqua and Yaroslava Shvedova 6-3 6-3 in the final last night. Sania's win capped off a memorable US Open for Indians as Leander Paes had won the mixed doubles trophy with Hingis on Saturday, in a repeat show of the Wimbledon.It was Sania and Hingis' second Major title in a row, having won the Wimbledon championships earlier this season.Sania now has five Grand Slam titles in her collection.She won three Mixed Doubles trophies, the last one coming at this very venue with Bruno Soares in 2014.In an extraordinary season, Hingis has won five Grand Slam titles this season, taking her overall number to 20. She won three titles with Paes and two with Sania.