The latest poll has revealed that the respective campaigns battling to decide the future of Scotland are nearly tied only nine days before the referendum.
According to the TNS poll, 39% plan to vote against independence, after support slipped massively from 45%; some 38% of Scots plan to vote for a union break - gaining ground from 32% recorded previously.
"This poll reveals a remarkable shift in voting intentions," said Tom Costley, head of TNS Scotland.
"It is too close to call and both sides will now be energised to make the most of the last few days of the campaign and try and persuade the undecided voters of the merits of their respective campaigns."
Scottish people will vote in an independence referendum on 18 September, 2014, and will be asked the straight "yes/no" question: "Should Scotland be an independent country?"
According to a YouGov poll on 7 September, support for Scottish independence took the lead for the first time since the referendum was announced.
The poll, which was conducted between 2 and 5 September, show 51% of the 1,084 surveyed are planning to vote for independence while 49% intend to opt for staying within the union with England.
The polls show that the Yes vote has gained ground from the number of women moving into the pro-independence camp.
The TNS poll showed that women over the age of 55 were more likely to vote Yes in the referendum.
Around 41% of women surveyed intended to vote No, which is a drop from the 49% from the previous month, while 35% of women are opting to vote Yes in the referendum.
However, there is still a glut of undecided voters in Scotland: those who still don't know who they will support on the ballot sheet has risen to 18% from 16% in the previous month.