The Dutch manager is in dire straits, with his side losing their second successive Champions League game of the season.
United have now lost a remarkable six of their first ten games, their worst start to a season in decades.
However, Ten Hag insists he still has the backing of Manchester United's board.
He told reporters after a 3-2 loss to Galatasaray at home: “Last season went brilliant, terrific more than we could expect.
“But also in this project we knew there would be gaps and in this period we are in a very difficult period but we come out together, fight together, stick together and that is me the directors, the team, altogether we will fight.
“This is not us we know we will do better."