Gary Hooper is confident Celtic can turn around their UEFA Champions League tie with Sporting Braga.
The Bhoys are staring at an early exit after going down 3-0 in last week's first leg in Portugal, with Alan scoring a first-half penalty before Elderson bundled in a late corner and Matheus converted a 30-yard free-kick.
Hooper completed his £2.4million move from Scunthorpe the day before the game so watched from the sidelines.
The 22-year-old striker felt the scoreline flattered the hosts and is therefore convinced his new club can overturn their three-goal deficit at Parkhead on Wednesday and reach the play-offs.
"We've been talking about it (the first leg)," he said. "There was nothing in it really other than set-plays and it wasn't a penalty.
"I think we've got every chance of getting through. If we attack them and press really high, I think we'll have no problem.
"If we get one, we'll get a few and win 4-0 I reckon. I don't think they were the best at home.
On the back foot
"We have to get the ball off them quickly, get them on the back foot and take our chances."
Hooper scored as Celtic came from 2-0 down to draw 2-2 with Lyon in the Emirates Cup on Saturday.
He then watched his team-mates launch a late fight-back in a 3-2 defeat by Arsenal the following day and reckons another comeback is on the cards.
"We have to cut the mistakes out - that's what pre-season games are for," he said.
"I thought we played well in the last half an hour against Arsenal.
"If we can press Arsenal like that, we can do the same on Wednesday."