The former prime minister and finance minister of Luxembourg is widely considered one of the most experienced European Union politicians.
Juncker was referring to the fact that he was the first European Commission President designated according to the procedure outlined in the 2009 Treaty of Lisbon, in which the vote of the citizenry indirectly decides who will occupy that position.
Juncker said we should not allow the Brits to pursue trade deals with others because they are not allowed to do so.
In the same interview, Juncker also voiced doubts over whether the EU's remaining 27 members would be able to maintain a united front during the Brexit negotiations, as well as when Britain leaves the bloc.
Mr Farage told the Press Association: "I am surprised that Jean-Claude Juncker is so anxious about the British".
Mr Juncker reiterated that Britain can not negotiate trade deals as long as it remains in the European Union....
The European Commission is responsible for proposing new EU legislation, drawing up the EU's budget and supervising EU funding.
"Do the Hungarians and the Poles want exactly the same thing as the Germans and the French?" Newly elected European Parliament President Antonio Tajani and European Council President Donald Tusk are also from the political group, which spurred speculation that other parties could push for Tusk to be ousted.