Li says dip in form related to mental toughness

BEIJING - French Open champion Li Na says her dip in form since winning at Roland Garros is because she cannot stay mentally tough. Li, who became the first Asian to win a Grand Slam singles title in June, says all the women on tour have the same problem, while the men can stay stronger all season. Li says "all the active women tennis players have the same situation of ups and downs in the competitions, almost everyone," adding that "women cannot have the same mentality of men, who expect to win every competition." Li also reached the Australian Open final, but she lost in the second round at Wimbledon and in the first round at the U.S. Open.