A few months short of his 16th birthday, he made a debut for the club against Celje in a Slovenian PrvaLiga match on 24 May 2008, coming on as a late substitute.

Vučkić made his Newcastle debut on 26 August 2009 as a late substitute in a League Cup tie with Huddersfield Town, where he played on the left wing.

[14] Vučkić scored his first senior goal for Newcastle against Carlisle United in a friendly on 17 July 2010 with a curled effort into the bottom left hand corner.

[17] He continued his impressive display against Arsenal in the League Cup fourth round getting the Man of the Match award despite Newcastle losing 4–0.

He went on to make his first Premiership start for Newcastle against West Bromwich Albion on 21 December and won plaudits for his performance, which included hitting the woodwork from 30 yards and forcing a fine save from the opposition goalkeeper.

[33] Vučkić had spoken with Newcastle manager John Carver before deciding to move to Scotland; "I wasn't in his plans at the moment and he advised me to go and play football.

[36] On the last day of the summer transfer window 2016, Vučkić was reunited with former Rangers boss Stuart McCall at Bradford City on a six-month loan deal.

[41][42] In September 2008, Vučkić played for the Slovenia under-17 team in the 2009 UEFA European Under-17 Championship qualifiers, where he scored three goals in three games against Turkey, Russia and Malta.

[43][44][45] Despite being only 16 years old, Vučkić played for the Slovenia under-19 team during the finals of the 2009 UEFA European Under-19 Championship, held in Ukraine in July 2009.

Vučkić made his debut for the senior national team on 29 February 2012, replacing Valter Birsa in the 61st minute in a friendly match against Scotland.

[54] After continuous pressure from both the media and the fans – primarily from Bosnia – upon the then 18-year-old, he made an open statement about the matter: I will not hide that I am proud of my ancestry.

Rumours that are being spread in public do not concern me as I have decided a long time ago on whom I wish to play for.Wigan Athletic Twente Buriram United