Juve are battling for Europa League qualification in the final weeks of the season.
"This season saw a new Coach come in and lots of new players," said the summer signing from CSKA Moscow. "It is only normal that we've faced some difficulties."
Juventus' season took another negative twist on Sunday when they threw away a two-goal lead against Chievo in a match that ended 2-2.
"It was an incredible game against Chievo, ending in a way that nobody expected," continued the Serbian winger.
"I hope next season will be a better campaign than the one that is coming to an end - and that we can be in the hunt for something important."