Neil Lennon has talked about the importance of getting stuck in against Livingston as they return to Premiership action on Wednesday night.
Celtic lost 2-0 away against Livingston in October, with defender Christopher Jullien admitting afterwards that he had been "too nervous".
Lennon's side won 4-0 against Livi at Celtic Park in December, and he believes Jullien and his team-mates will be prepared for a physical encounter this time around.
Lennon said: ""He played really well in the home game against Livingston a few months later. I think he has got accustomed to the British game.
"Look, we are under no illusions, it's going to be a battle and we have to earn the right to play.
"Everyone talks about the pitch, we have played on many artificial pitches this season.
"We are going to have to roll our sleeves up and do the dirty side of the game well."
"It's a tough game. There is no question.
"Their home form is excellent and they are a big, strong team. They can play three at the back or four at the back. We are under no illusions how difficult it is going to be. It's going to be a very tough game and not for the faint-hearted.
"They can be direct, they have good energy, they are a threat at set-plays and they do it very well. We have to overcome that and match whatever they throw at us, and then better it.
"We have got to be at our best and focused and concentrated, and we have to be physically strong as well."
