15-year-old American CiCi Bellis advances at Miami Open

KEY BISCAYNE, Fla. (AP) Precocious amateur CiCi Bellis says she's ready to take on the best of the pros - Serena Williams.

Bellis, a 15-year-old American who made a big splash at last year's U.S. Open, advanced Friday to a potential third-round match against Williams by beating Zarina Diyas 6-2, 6-1.

Williams was scheduled to play a second-round match Friday night against Monica Niculescu.

Others advancing in the women's draw included No. 3-seeded Simona Halep, the titlist last week at Indian Wells. She won 6-4, 2-6, 6-1 against wild card Nicole Vaidisova, a two-time Grand Slam semifinalist mounting a comeback from two shoulder operations.

Men's winners included No. 8 Tomas Berdych and No. 25 Bernard Tomic.