Sorana Cirstea, 20, reached one semifinal and a pair of quarterfinals and ended the year No.95.
Anastasija Sevastova, 20, won her first WTA title in Estoril and finished the season at No.45.
Caroline Wozniacki, 20, won six WTA titles in 2010 - more than anyone - and finished at No.1.
Tamira Paszek, 19, won her second WTA title in Quebec City and finished the season at No.90.
Polona Hercog, 19, reached her first career WTA final in Acapulco and finished the year No.48.
Ksenia Pervak, 19, is the only lefty on the countdown and finished No.97 on the year-end rankings.
Anastasia Pavlyuchenkova, 19, was the only teenager in the year-end Top 40, finishing at No.21.
Melanie Oudin, 19, reached the quarterfinals or better five times in 2010 and ended the year No.65.
Simona Halep, 19, reached her first WTA final in only her third event and ended the year at No.81.
Bojana Jovanovski, the only 18-year-old on the year-end rankings, wrapped up the season at No.71.