Clijsters laments lack of fighting spirit

Kim Clijsters admitted she ran out of "fighting spirit" as she lost to Victoria Azarenka in the quarter-finals of the Sony Ericsson Open in Miami.

Defending champion and second seed Clijsters was beaten 6-3 6-3 by the eighth seed from Belarus, who is looking to repeat her 2009 title success at the WTA Tour event.