By Chris LaBate

WBA/IBF junior welterweight champion Amir Khan has apologized over a comment the boxer posted on his personal Twitter page on Thursday.  Robert Guerrero suffered a left shoulder injury and withdrew from his upcoming fight with Marcos Maidana, scheduled for August 27th.

After Khan became aware of the news, he made a claim on his Twitter page that Guerrero's injury was non-existent and Maidana paid him “step aside money” to become the WBA's "regular" champion at 140-pounds. Khan is the WBA's "super champion" at 140. While Khan apologized to Guerrero, he continued to exchange verbal jabs with Maidana.

"I was messing around about the injury of Guerrero. Apologies for the tweet. I'm sure he didn't get paid step aside money. Someone said it was an arm injury in sparring [that] Guerrero suffered. Well let's hope he recovers. I bet Maidana is happy for not wanting  to get beat up,” Khan said.