There had been suggestions that Coloccini may not return to the club, but he has checked in as scheduled and will continue discussions with the Premier League side.
The 31-year-old Argentina international's representatives met Newcastle officials earlier this week to discuss his desire to return to South America because of personal problems.
Argentine club San Lorenzo have been chasing centre-back Coloccini's signature after he told the Magpies of his desire to leave.
Newcastle boss Alan Pardew is understandably keen to retain the services of one of his most dependable defenders and has resisted attempts by San Lorenzo to prise him from Newcastle's grasp.
However, the matter remains unresolved and efforts to find a solution are ongoing.