When his brother moved to OFK Kikinda, where he made most of his career, Borovnica signed with FK Proleter Zrenjanin who were desperately fighting for the return to the Yugoslav First League.
Next year he went for trials in the giants Red Star Belgrade making a good impression with the coach Gojko Zec and signing a contract with them.
He would not regret it, because Borovnica ended scoring two goals and helping the team make one of the most incredible turnarounds in football history, with a final 4–1 win.
Next he decided to go abroad, again, he had a brief spell in Australian Footscray JUST in 1977, this time to France Ligue 1 team SC Bastia where he played the 1982–83 season.
[2] Afterward, he returned to Yugoslavia where he represented a number of First League clubs, namely, Olimpija Ljubljana (1983–84), Dinamo Vinkovci (1984–87) and Sutjeska Nikšić (1987–88).