Janković is currently sponsored by Italian sportswear company Fila. Previously, Janković had endorsed Anta and Reebok sportswear, and had her own line with them for her tournament wear. Janković also has an endorsement with Prince Sports: in her early career until 2007, she played with the original Prince O3 Red; from 2008 to 2010 she used the Prince O3 SpeedPort Pro White; from 2011 to 2013 Janković played with different types of racquets and in 2012 and 2013 she chose blacked out ones; since January 2014 Janković has been playing with the Prince O3 Red LS.
