Capoue only joined Tottenham from Toulouse in the summer, but has fallen out of favour following the arrival of mew manager Tim Sherwood.
The Frenchman made five starts under former boss Andre Villas-Boas - a number that was largely restricted by injury - and just one since Sherwood took charge in mid-December.
He looks likely to be heading for the exit at White Hart Lane in this window, with youngster Nabil Bentaleb promoted ahead of him - although Tottenham are said to have scuppered the deal by demanding £12 million for a player they paid £9 million for a few months ago.
However reports today suggest that Railoa has flown into London to hold talks with Tottenham to see if the deal can be resurrected before the shut of the January window.
Eurosport suggest that Raiola's presence could be key to getting the transfer over the line.
Tottenham have been remarkably quiet in the transfer window so far, having been one of the most active teams in the summer.
Then, they splashed well over £100 million on seven new players - although that didn't have the desired impact as Villas-Boas left his position in December after a poor run of form which included 6-0 and 5-0 defeats against Manchester City and Liverpool.
Napoli are believed to be in the market for a midfielder, and have been linked with Barcelona's Alex Song recently.