UFC middleweight champion Anderson Silva informed Globo’s SporTV that he is battling a knee injury suffered in training for his planned bout with Chael Sonnen at UFC 148: Silva vs. Sonnen II.

The card is set for July 7 from Las Vegas after it was shifted from UFC 147 in Brazil.

Silva has posted a message on Twitter where he says the knee injury is not serious and that he is, “doing very well thank you!” “The Spider” added to, “stay calm day on July 7 will be doing my job.”

Silva and Sonnen first fought in 2010, with Silva scoring a submission victory in the fifth round.

Photo credit: Marcelo Alonso/Sherdog