 On October 19, 2013, Knežević scored a brace in Radnički's 3-2 win against OFK Beograd.On May 3, 2014, Knežević scored in Radnički's 1-0 win against Čukarički, in a match that determined whether or not Radnički would remain in the SuperLiga or get demoted to the Serbian second tier.On 4 July 2014, Knežević signed a loan deal with Primeira Liga side Vitória Guimarães.