Downing Street revealed yesterday that Cameron had cancelled a trip to Denmark and Sweden this week and would instead sit down with Juncker for crunch talks ahead of next month's European Council meeting.
Downing Street said the Prime Minister will travel to Brussels tomorrow to meet one-on-one with Juncker to discuss his efforts to renegotiate Britain's relationship with the EU, leading many to question whether Cameron was still targeting a deal at next month's meeting.
Reuters reported this afternoon, however, that the two men are expected to focus on the emergency brake, which would allow member states to petition the EU to be allowed to deny benefits to EU migrants for up to four years, if the countries could prove that their welfare systems were under excessive pressure.
Cameron had originally planned to travel to Stockholm and Copenhagen at the end of this week for meetings with Swedish Prime Minister Stefan Lofven and Danish Prime Minister Lars Lokke Rasmussen.
Cameron has said that he wants to secure a reform deal when he meets with the heads of state and government from all 28 EU member states at February's European Council.
The Prime Minister has promised to hold an In/Out vote on Britain's EU membership before the end of 2017.