Portuguese coach Sa Pinto is a fan of the Serb and believes he will impress for Porto.
"He understands both the six and eight positions, because he understands the game very well," Sa Pinto began.
"I don't know if it will be indisputable, but he played two seasons in Hertha, in the Bundesliga, a very strong and competitive championship, where only those who have quality play.
"The big three (clubs in Portugal) have limited finances, so for the money FC Porto can spend he is a good solution.
"He is a tall player, with good skills, aggressive, fast, quality in both long and short passes, but above all he is very committed, calm and always ready to learn."