Tottenham defender Younes Kaboul will give Sunderland his answer today over the prospect of moving to Wearside.
And Raba has now confirmed Kaboul, who has also been linked with Portsmouth, was impressed with what Keane had to say and is now considering his options.
He said: "Younes was very impressed with Roy Keane when he met him, especially with his vision for Sunderland Football Club.
"He was also very impressed with the city, stadium and facilities which, to be fair, are second to none.
"Younes also appreciated the fact that Roy and Sunderland have given him a couple of days to make a decision. I now expect him to make up his mind in the next 24 hours."