Anzhi restart their season next month and have been struggling to find a replacement for Chris Samba who left for QPR in January. They were hoping that they could strike a loan deal with Spurs for Kaboul but the offer was refused first in January and then when the transfer window in Russia closed on Wednesday night.
The North London club want to keep Kaboul and Villas-Boas personally indicated that he very much features in his future plans, according to The Guardian
Kaboul has been out since the first game of the season with a knee injury that required surgery but he has just returned to training. The defender was impressive last season for Spurs and there is a good chance he might return to fitness in time to play in the remainder of their chase for a Champions League place.
The Frenchman, who earns around £35,000 a week, has a contract with Spurs until 2014 and he will most likely be offered an extension to stay at the club if he can manage to stay fit until the end of the season.
Anzhi resume their domestic season next month after the winter break and are currently in second place behind CSKA Moscow. They are in pursuit of top place and have signed Brazilian winger Willian and left-back Andrey Yeschenko to aid them in their chase.
Meanwhile Gylfi Sigurdsson has warned his Spurs team mates that even if they beat rivals Arsenal this weekend then they will still have to perform to qualify for the Champions League.
“It is going to be a massive game for us,” said the Iceland international.
“However, anything is possible in football. The league was won in the last minute on the last day [last time], so even if we beat them it is not finished. We want to get in to the Champions League, that is our aim. If we achieve that, we want to finish as high as we can.”