New Delhi, Sep 10 (ANI): Rafael Nadal claimed his second US Open title and 13th Grand Slam crown by defeating world number one Novak Djokovic 6-2, 3-6, 6-4, 6-1 in a lung-busting, big-hitting final. Nadal described beating Djokovic as "amazing", having come back from a serious knee injury earlier in the year. Nadal___s win also earned him a total of $3.6 million, which takes his career earnings through the $60 million mark and also edged him closer to Roger Federer's record of 17 majors and put him one behind Pete Sampras.