World number 26 Serena Williams defeated world number 18 Anastasija Sevastova 6-3, 6-0 on Thursday to enter her ninth US Open final, 19 years after her maiden Flushing Meadows final. Serena has played 30 Grand Slam finals till now, winning 23. The 36-year-old American will face 20-year-old Japan's Naomi Osaka in the final on Saturday.