Spurs have lost all three games of Tudor's tenure after he was hired to replace sacked manager Thomas Frank. As it stands, Spurs sit just one point outside the bottom three.
"I think he's been slapped straight in the face by the competition in the Premier League," Sherwood told Sky Sports.
"It ain't easy. This is a tough competition. He looks lost at times on the touchline; he knew nothing about it."
He added: "He's gone from, 'I 100 per cent guarantee we spend next season in the Premier League', to, 'the players are not fit enough, we're not good in attack, we're not good in the middle, we're not good at the back, we need our injured players back to fitness'.
"You've got to get on with what you've got. Forget all that nonsense. Concentrate on the players who are fit at the moment and try and give them a lift.
"You don't get that (new manager) bounce by having a stick and whacking them with it. Not if the downside looks like relegation.
"You have to give them a cuddle. You have to find the best solution. You have to give them an easy solution to how we're going to play. This is how we play."