The Tunisian cannot even drink water until after midnight, with the club’s dieticians helping him through his daily fasting.

“Ramadan is a great month for Muslims, but the fasting does require sacrifice,” Tounekti explained. “We cannot eat or drink anything until after midnight. At that time, I can eat or drink and, of course, when the fast is over I can have what I want.

“The fasting is something I have been doing for a long time so I know what I should do to keep myself in good shape and what not to do.

“It is something I am used to and, of course, the club has been amazing in supporting me through Ramadan. The dieticians work with me closely to tell me what to eat and what not to eat.

“It is true I have had a busy year as I went straight from playing with Hammarby in a Swedish campaign which runs over the summer into a Scottish season with Celtic.

“On top of that I have had international games for Tunisia, so it has been non-stop. I have not felt fatigued. Rather, I would say I feel happy and really blessed to have been able to play so much football.

“Probably the only thing I would say is that since coming to Celtic I have had to get used to playing a game every three days. That has been a change.

“But the club is so good at using the whole squad. The way they rotate it everyone gets a chance to play. That is especially true in the front line. If you are not starting, then you know you have a chance to get involved later in the match.”

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Tounekti always seems to make a greater impact off the bench than from the start. Brought on at half-time in last weekend’s 2-2 draw at Ibrox, the left-winger caused Rangers‘ backline all sorts of problems.

“Myself and Reo [Hatate] were put on in the second half,” Tounekti said. “I think the aim was for us to bring some extra energy to our performance because things had not been going well.

“And I think we were able to do that which was good. We were able to help the team a little bit and we were able to come back to draw. That was pleasing and I think it showed what I am saying that it can be good to switch things around a bit at times.

“Now we are back there again in the cup, and I am 100 percent ready to go again. In fact, I would say we will be even more motivated because of the way we started in the first half last time.

“We were happy with the second half performance but now we want to play like that for the whole game.”

For the first time in eight years, Celtic will have the Broomloan Road stand at Ibrox filled with their supporters tomorrow afternoon.

“Wow, yeah. That is something I am really looking forward to,” Tounekti continued. “I love to play in front of them.

“To have that number with us at Ibrox could be a big thing for us and I am really looking forward to it.

Sebastian Tounekti made an impact off the bench last weekend against Rangers. (Image: Mark Runnacles / Shutterstock)

“I was away at AFCON when we lost the home derby at Celtic Park, 3-1. I saw the whole game on my iPad. We were supposed to play the round of 16 game on that evening and the game was on at 1pm or something.

“I saw it alone but after the game my teammates were asking me all about it because everyone knows about the derby. It is one of the biggest matches in the world so everyone takes an interest.

“Every time you have to play in a match like this one you feel really blessed. To be able to go out and represent a club like this in such a big game is a privilege and one which makes me really proud.”

“To have come through two hard away games away to Rangers and Aberdeen, who although their league position is not the best have good players, the way we have done is pleasing.

“My view of Scotland is that all the away games are difficult to win and now we have another test coming up on Sunday. It will be hard but we are ready for it.”