He has started with a defeat, a win and a draw in the three games since Andre Villas-Boas was sacked.
But Holtby said: "The gaffer is new in and he is trying to put his thinking into the team and we have to stick behind that.
"We have to put 100 per cent dedication to that. I think he has a good opinion of football and his style of play is nice.
"He likes to play forward attacking football. We need to give him some time because it's not easy coming into a hectic phase of a club when you have a Christmas period.
"You don't have much time to train. All the credit to him - he has calmed things down. The things he has tried to bring to us, they are really working."
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