PARIS — Agnieszka Radwanska beat Oxana Lyubtsova 6-1, 6-1 today in the first round of the Open GDF Suez, and Monica Niculescu, Nathalie Dechy and Emilie Loit also advanced to the second round.

Lyubtsova won only four points on her serve in the match. Radwanska will next face Alisa Kleybanova, a 19-year-old Russian who reached the fourth round at the Australian Open. Kleybanova defeated Tsvetana Pironkova 6-2, 7-6 (3).

Niculescu beat Timea Bacsinszky 6-4, 6-3, Dechy defeated Sorana Cirstea 6-2, 1-6, 6-2 and Loit eliminated Nicole Vaidisova 6-1, 6-4.

Vaidisova, a former top 10 player, is struggling to get back to her best. Tuesday's loss was the 19-year-old Czech's third first-round exit of the year.