VIDEO: Hummels after finding out opponent's age: '17 years old? What the f***!?'

Borussia Dortmund avenged an absolutely dreadful start to its Europa League qualifying campaign with a victory after finding itself down three goals to Norwegian side Odds BK inside the match's opening 30 minutes.

While the team eventually came out on top with a 4-3 scoreline, the surprises didn't end there as centre-back Mats Hummels revealed sheer and utter shock when told about his youthful opponents.

After offering his praise for Odd winger Rafik Zekhnini, whose surging runs up the flanks proved difficult for Dortmund players to contain, one reporter revealed he was still just a teenager.

Hummels did a double-take after finding out Zekhnini was just 17, saying: "17-years-old? What the f***!?"

(Courtesy Daily Sports)