WUHAN, China — In her first match since losing in the US Open final, Roberta Vinci rallied to beat qualifier Danka Kovinic of Montenegro 5-7, 6-1, 6-3 Monday in the first round of the Wuhan Open. The 15th-seeded Italian was broken three times in the opening set, but picked up her game to advance to the second round. At the US Open, Vinci stopped Serena Williams' bid for a calendar-year Grand Slam by upsetting the American in the semifinals. Eugenie Bouchard withdrew from the tournament Monday because of the concussion she sustained during the US Open. The Canadian said she's “frustrated and disappointed” that she won't be able to compete. “I travelled to Wuhan with the intention of playing. Unfortunately, my concussion symptoms came back during practice Saturday and it would not be safe for me to go on court,” Bouchard said in a statement. Also in the first round, ninth-seeded Ana Ivanovic of Serbia defeated Alexandra Dulgheru of Romania 6-1, 6-3; Sloane Stephens of the United States beat Alison Riske 7-6 (4), 6-3; and 14th-seeded Madison Keys beat Magdalena Rybarikova of Slovakia 6-2, 4-6, 7-6 (4). Eighth-seeded Karolina Pliskova of the Czech Republic, who had a bye in the first round, defeated Mirjana Lucic-Baroni of Croatia 7-6 (4), 5-7, 7-6 (5) in the second round. Lisicki out for season Sabine Lisicki says she will sit out the rest of the tennis season to heal a knee injury. The 2013 Wimbledon runner-up last played at the US Open and lost to Simona Halep in the fourth round. Lisicki wrote on her Facebook page that she's been struggling with the injury before and during the US Open. She did not specify which knee was injured. Despite getting treatment from two doctors in Germany, Lisicki says “unfortunately my knee is not ready and I will not compete at tournaments this season.” Lisicki is ranked No. 28 in the world this week. Radwanska moves to 7th Poland's Agnieszka Radwanska has been rewarded for her victory in the Tokyo Open last week by climbing six places to seventh in the new WTA rankings released Monday. American Serena Williams, the Wimbledon, Roland Garros and Australian Open champion, continues to dominate the rankings with more than double the points of everyone except second-placed Simona Halep. The other significant mover was Halep's Romanian compatriot Irina Begu, who rose three places to 26th on the back of her victory in Seoul last week. Her beaten opponent in the final, Aliaksandra Sasnovich of Belarus made the most significant strides, rising 34 places to 102nd. The biggest loser in the top places was former world number one Caroline Wozniacki, who fell five spots to 11th. — Agencies