The defender has not played for the Premier League side since February.
Rafael Benitez's men go into the final game of the campaign needing to beat high-flying Tottenham to stand a chance of remaining in the Premier League - though their fate could be sealed beforehand if Sunderland beat Everton on Wednesday.
However, they will have to battle Mauricio Pochettino's men without the centre-back, who has not played for the club since the humiliating defeat to Chelsea in February due to a calf injury, but the 34-year-old - who has another year left to run on his contract at St James' Park (via Shields Gazette) - has issued an emphatic response regarding doubts over whether he remains committed to the club.
"Yeah. Yeah, of course," he told the Shields Gazette when asked whether he was still committed to the team.
"But I'm not thinking about the future, I'm thinking about this present [moment] and keeping Newcastle in the Premier League. I don't look in the future now."
With a squad - including a manager - that will have very little experience of the damage that relegation can cause, the Argentinian certainly has a role to play ahead of the final day.
He was part of the Newcastle side that went down in 2009, and should the same fate befall the team this time around, his experience of knowing what it takes to get out of the second tier could prove invaluable to them next season.