Chris Sutton reckons Neil Lennon got his tactics all wrong against MIlan as he persevered with the 3-5-2 that failed against Rangers.
Celtic found themselves 2-0 down to the Italian side at half time, before the manager reverted to a 4-3-3 at the break which sparked a second half revival.
It was too little, too late for the Premiership champions, but the change of system and the introduction of Mohamed Elyounoussi and Ryan Christie was positive.
Lennon said he couldn't use a 4-3-3 to start the game as Christie could only manage 45 minutes after his period of self-isolation last week.
Pundit Sutton doesn't dispute that, but questions why he didn't start the midfielder and use him for the first half, instead of the second.
He said in his Daily Record column: "He (Christie) made a real difference to the team when he returned from self isolation, yet his appearance from the bench for the second period gave me more questions than answers.
"I can’t understand why he didn’t start the game. The changing of the shape at the interval with the introduction of him and Mohamed Elyounoussi made a huge difference and it looked like an admission from the manager that he got it wrong at the beginning by sticking with the 3-5-2 formation which was so dismal against Rangers.
"Neil said the medical team told him Christie couldn’t start. I’m not going to argue with that. I’m not privy to those conversations.
"But if he could play the second 45 minutes, surely he could have played the first? Surely it’s better to go as strong as possible to start and maybe be 1-0 up at half-time as opposed to 2-0 down?
"It’s gone now but he provided a threat which was again lacking."
Sutton was also impressed with the cameo from Tom Rogic, who looked a threat when he came on in the second half.
The former Celtic striker believes he should go straight into the team against Aberdeen as he has qualities that no other player possesses in the side.
He added: "Tom Rogic has been a magic man without his wand for a while.
"But the Australian might just be the one who can weave the spells and turn things around for Neil Lennon.
"Let’s be honest, we all thought his days at the club were numbered.
"He’s barely been fit and he’s barely started a game for Lennon in the past year and his inactivity left the door open to a move in the summer with places such as Qatar eyed as an option.
"Rogic, though, still has something none of his team mates have.
"Something that has been sadly lacking at times this term. Craft. Guile. An ability to do something out of the ordinary and special.
"The Antipodean gave me signs against Milan that he’s not a busted Parkhead flush.
"It was only a short appearance from the bench as he took the place of Scott Brown to give more creativity and that’s what he did. Some of the touches, the positions he took up, the ability.
"It’s no secret I’m a fan of his. At one stage during the Brendan Rodgers era, he was a go-to man for big games. You don’t just lose it. Rogic has still got it in there and now would be a mightily important time to produce it.
"If I were Neil, I’d be starting him at Aberdeen tomorrow. He’s got the ability to carve Aberdeen apart. Even if you can only get an hour of him, he could have won you the game by then with some magic."
