The £10million defender is set for crunch talks with Alan Pardew and managing director Derek Llambias this week after declaring his desire to move back to Argentina for personal reasons.
"Colo plays for Newcastle, he is a Newcastle player, so for us nothing has changed," the French international said.
"Nobody was thinking about that situation on the pitch.
"The back four and the keeper all played well. For us a clean sheet was the most important thing and will give us more confidence. It will make us more solid."