Holtby insisted the players are fully behind Villas-Boas to continue the recovery from the 6-0 humiliation at Manchester City and extract full value from his expensively-assembled squad.
"We all stick behind the gaffer," Holtby said. "He bonds us together and is very close to the team. Everyone accepts him and his way of playing football.
"There is a lot of negativity coming from outside but we are all sticking together. Bringing this bad mood into the team will not help. We are positive and we know that the season is long.
"Of course we had a tough time in November but last night we got a good result at a difficult place. Now we need another three points from the Sunderland game.
"We are not discussing things that are happening outside, that is not our job. Our job is to get points to win games and make the fans happy. That is our main objective.
"We have to do our talking on the pitch. We were responsible for that disaster at Manchester City but the way we responded after that has been good. We have to carry on doing that.
"There are games every three days in December so we have to be up for it every time. Last season, we did really well during this time and got ourselves to the top of the table.
"The fixtures we have are very important now and there is a possibility of getting a lot of points."
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