Anett Kontaveit stretched her winning streak to 12 matches by beating Karolina Pliskova 6-4, 6-0 to secure a spot in the semifinals at the WTA Finals. The 25-year-old Estonian now has won 28 of her last 30 matches, including her title run at Ostrava. Prior to that stretch she had a 19-13 record for the year. (More Tennis News)