World number one Rafael Nadal was at his awe-inspiring best on Friday evening after beating Juan Martin del Potro to reach the US Open final. <br /><br />The Spaniard crushed his Argentine opponent 4-6 6-0 6-3 6-2. Despite a first set wobble, Nadal soon found his stride, cruising to victory. <br /><br />A two time US Open winner, Nadal will be seeking his 16th Grand Slam title on Sunday, against surprise victor Kevin Anderson. <br /><br />The South African beat Spaniard Pablo Carreno Busta in the earlier semi-final 4-6 7-5 6-3 6-4. <br /><br />Ranked 32 in the world, Anderson is the lowest-ranked man to reach a US Open singles final since the ranking system began in 1973.<br />