Tosic, loaned to Cologne by Manchester United in January, scored his first two goals for the Bundesliga club in their 4-1 win at Hanover, the first a dazzling solo effort from 20 metres.
Tosic, capped 18 times, was utilised as an impact substitute for Serbia during their impressive World Cup qualifying campaign, but is not assured of a spot in Antic's 23-man squad for the finals in South Africa.
"The coach has made very few changes to his starting eleven throughout the qualifiers and there were hardly any new faces in the post-qualification build-up," Tosic told Belgrade media after his effervescent performance against Hanover.
"It shows how difficult it is break into the squad and I will play my socks off until the end of the season to earn my place in the World Cup squad."
"As for my club future, I've been told that United staff will be watching my progress and I will know after the World Cup whether I will stay at Old Trafford or move on," he added.
With some of Serbia's key players going through a quiet spell with their clubs, Tosic has an opportunity to really impress Antic.
Wingers Milan Jovanovic and Milos Krasic, both ahead of Tosic in Antic's favourite 4-4-2 formation, have also been in mediocre form recently.
