US Open: Serena Williams still eager to raise her level

Serena Williams underlined that she's a perfectionist, yet again. Not that anyone contested the 23-time major winner's claim. After blitzing Russian Margarita Gasparyan 6-2, 6-4 in the US Open second round, the 38-year-old said one of her earliest memories was the exercise of writing alphabets when she was three or four years of age.