Jelena Jankovic of Serbia reacts after losing a point against Angelique Kerber of Germany during the semifinal of the WTA Qatar Ladies Open in Doha, Qatar, Saturday, Feb. 15, 2014. (AP Photo/Osama Faisal)
Angelique Kerber of Germany celebrates after winning a point against Jelena Jankovic of Serbia during the semifinal of the WTA Qatar Ladies Open in Doha, Qatar, Saturday, Feb. 15, 2014. (AP Photo/Osama Faisal)
Flavia Pennetta of Italy celebrates after winning over Angelique Kerber of Germany during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 19, 2014.(AP Photo/Eugene Hoshiko)
Flavia Pennetta of Italy celebrates after winning over Angelique Kerber of Germany during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 19, 2014.(AP Photo/Aaron Favila)