The goalkeeper is well aware that legs will be weary in the Rangers camp following their midweek exertions against Stuttgart in the Champions League.

But he believes the backing of 50,000 fans helped spur the team on to a memorable 2-1 win over the Bundesliga champions and insists the backing of the supporters can make all the difference again when Aberdeen come calling on Sunday.

"Hopefully the crowd will get behind us again," said McGregor. "It was a good atmosphere on Wednesday, I really enjoyed it. It was my first Champions League game and it was a really good experience.

"The result itself was good. Stuttgart are the German champions and people had written us off. I also thought the performance was good and we got the tactics spot on and we did the business.

"Hopefully it will do a lot for us. Coming from a bad result against Hearts, it was a good result during the week and hopefully it will give us confidence for Sunday."

As well as Stuttgart, Rangers will also face Lyon and Barcelona in the so-called 'group of death' but three crucial points from their opening match means McGregor is confident of competing in the Champions League as well as the SPL.

"As soon as the group was drawn, everybody was doubting us," he admitted.

"Even a few of my mates had written us off, thinking we wouldn't even get a point from the whole group but we proved a lot of people wrong on Wednesday night.

"It's a totally different standard of opposition but, as a player at this club, you have to make the step up. It's been like that for years and I'm sure it will be like that for years to come.

"We need to take it game by game. Obviously we have the confidence now that we can compete at that level so I don't see why we can't do well in the group."

Even so, domestic duties remain the priority for Rangers as they attempt to prevent Old Firm rivals Celtic claiming their third consecutive championship this term.

"The league is the most important thing for me," said McGregor. "If you do well in the Champions League, it's a bonus. But the league is the most important thing.

"At this club you need to win every game and that's what the manager drills into all the players who haven't been here for that long. You just have to live with that at this club.

"I saw a wee bit of Aberdeen's game against Dnipro last night, they did quite well. Dnipro are a good team, they are second to Shakhtar Donetsk in the domestic league so it was a good result for Aberdeen."

On Sunday's game, he added: "It will be difficult for them because we have had a good result as well. It should be a good game."