PATRICK ROBERTS cursed Celtic's sluggish start against PSG that left the Scottish champions with the toughest of mountains to climb on Tuesday.

But the Manchester City winger, who made his first Parkhead bow after returning on loan for the season, insists confidence in the Celtic camp over their European progression has not been dented as a result of the 5-0 thrashing.

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Neymar put the Parisians 1-0 ahead on 19 minutes but even before that point the French outfit had the ball in the net only for the flag to go up to deny Edinson Cavani. In truth the home side never recovered from a whirlwind start by their visitors, and Roberts said: "I thought we could have made it more difficult for them from the first whistle but that is something that we need to learn. we need to go for it from the start.

"The first half was sloppy. We knew their quality, the game plan was to try to keep the ball as much as we could but at the end of the day they are world class players and they punished us.

"You could sense that fter the game. We let ourselves down. We should have plated more of our game."

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Turning his attention to the game with Anderlecht on the horizon, the winger added: "It doesn't damage confidence they are a top side who spend millions on their team. People expect to come here and put in a performance like that.

"We need to be at our best. And if you are not at your best they are going to punish you. It is not going to knock our confidence, we will be sharp as ever going into the next game. We will recover and go again.

"Every game in this group is important - they are all tough teams, we know that. We need to be 100% all the time. We have to be at it rom the first whistle or else they will punish us and PSG did that today. Whether it is Anderlecht, PSG or Bayern Munich we have to be at our best."