[5] For the next season, after he overgrew youth team, he was loaned to Serbian League Vojvodina side Sloga Temerin, where he played mostly matches as a bonus player.
[10] He made his debut for the first team of Vojvodina in the 22nd fixture match of the 2016–17 Serbian SuperLiga season, against Spartak Subotica, played on 19 February 2017, under coach Dragan Ivanović.
[12] Rockov collected over 720 minutes without a conceded goal in the Serbian SuperLiga matches between May and August 2017, including 2016–17 and 2017–18 seasons.
[15] In the meantime, Rockov also made an assist to Joseph Bempah in 2–0 away victory over Borac Čačak on 9 August 2017.
[19] In May 2019, Rockov, then a club captain, was elected for the best player of FK Vojvodina in the past season for the second consecutive time.
[23] He made his Serbia national football team debut on 10 October 2019 in a friendly against Paraguay.