After shooting 6-of-18 for 17 points in Wednesday's 91-89 loss to the Clippers, Dirk Nowitzki acknowledged that his right knee is causing him problems. "I'm having trouble bending my knees," said Nowitzki, who has been wearing a protective sleeve over the knee, the same one he sprained last season and caused him to miss nine games. "I've just got to get my legs stronger, get my base back. I've got to use my legs in my shot and hopefully they'll come back soon." Read more: http://espn.go.com/dallas/nba/story/_/id/7478926/dallas-mavericks-dirk-nowitzki-battling-knee-issues