In the US Open Tennis, top seed Rafael Nadal swept past Russian teenager Andrey Rublev to enter Semi-finals while third-seed Swiss player Roger Federer went down fighting with Argentinian Juan Martin Del Potro yesterday. Nadal saw off Rublev 6-1, 6-2, 6-2 in straight sets in one hour and 37 minutes. In another quarterfinal, Del Potro defeated the Swiss veteran 7-5, 3-6, 7-6 , 6-4. The women's doubles quarterfinal match of India's Sania Mirza and her Chinese partner Shuai Peng match against the 5th seeded duo of Hungary's Timea Babos and her Czech partner Aandrea Hlavackova was postponed last night due to rain. The match was suspended at 2-2 and later postponed for today.