"Oh, Oh, Oh, Oh, Oh, Oh, Ohhhh!"

It's the Celtic fans' newest refrain to the tune of Seven Nation Army by The White Stripes and it was chanted out with relish after Oh Hyeon-gyu announced himself fully on the Scottish football stage with a thunderous diving header during the Hoops’ 3-1 win over Hibernian at Parkhead.

The match-winning goal, it confirmed the birth of a new striking hero down Glasgow's east end. Every Celtic striker enjoys a moment which cements them as one of their own in the eyes of the faithful. This was Oh’s.

Former Hoops attacker Frank McAvennie suspects the South Korean he will now go from brute strength to strength – so much so that he could offer even more than the departed Giorgos Giakoumakis.

It was, of course, Oh's third goal since joining Celtic in the January transfer window but none of the others have been as significant.

"I think Oh needed this goal,” McAvennie told The Celtic Way .”It's the goal that cements him as a bona fide Celtic centre forward. It was such an important goal and a significant one for him personally.

"All the Celtic supporters left Parkhead on Saturday saying ‘you're one of us now, you'll do’. His top-off celebration and the Oh song that followed inside the stadium said it all. Every supporter there knew how important that goal was in terms of the title race.

"The fans can see for themselves that Oh is going to be a real handful. He's different from Giakoumakis and looks like he will be a massive asset to Celtic moving forward.

"He possesses a wee bit of everything – he can score goals, he can hold the ball up and play people in and he works tirelessly. He is a robust and physical boy who will shake up opposition defences.

"As well as a first-class worker, when he is in and around the penalty box he is a powerful unit and has already proved that he is no slouch. He has that presence and an aerial prowess which is an entirely different quality altogether from Kyogo Furuhashi.

"Oh stepped up to the plate at the weekend. He’s proven to himself, his manager, his team-mates and the fans that he can net big goals for Celtic at a crucial juncture and deliver when it matters. It was his goal that secured all three points.

“And it was a fabulous header. He buried it despite being fouled while in the act of scoring. He just made sure nothing or nobody was going to stop him from heading that ball into the net. That’s what I liked most about it – the desire and determination to get there and make it count even though he was in where it hurts. That attitude impressed me.

“I know that was his third career goal for Celtic but the others have come when the team have been well on top in games and in command by a few goals. This goal was different in the sense that Oh has made a massive and meaningful contribution in the context of this season's title race – scoring the winner for Celtic in a game that matters is a huge thing for a striker.

Celtic Way:

"Every Celtic attacker has a moment when they feel that it all of a sudden clicks into place for them and hopefully this was Oh's. He can relax a bit more on it now and, if he does, the goals may start to flow."

The 63-year-old former West Ham and Scotland forward is convinced that Oh now has the best of both football worlds at club and international levels.

Not only will he be learning from Ange Postecoglou in Glasgow but he will also come under the tutelage of German goalscorer extraordinaire Jurgen Klinsmann on the international scene after the former World Cup winner was recently appointed the new head coach of South Korea.

"From what I've been told Oh is a young man who is keen to learn his trade first and foremost,” McAvennie added. “He will gain so much knowledge under Postecoglou but not only that when he goes away on international duty he will be working under Klinsmann.

"Klinsmann was one of the best goalscorers in the business so this is a win-win situation for Celtic. Oh is going to be coached by a former World Cup winner – that should inspire you, give you real encouragement to produce the goods.

"And he’s only 21 so the potential for development with him is frightening. I just think there is so much more to come from Oh. He will only get better and better under Postecoglou and Klinsmann and his time will come sooner rather than later.”

READ MORE: Courts, the Kray Twins & expensive suits – inside the 1987 shame game

Many Celtic supporters have already compared Oh's goal against Hibs to Chris Sutton's headed effort against Juventus in the Hoops’ memorable 4-3 Champions League win at Parkhead in 2001.

Even Postecoglou himself was positively purring at what Oh could bring to the table in the future.

"Oh's going to be a fantastic player for us,” Postecoglou said after the Hibs game. “We’re slowly integrating him into things on and off the field but I see him every day in training – he’s such a presence and he has got good quality in him as well. He’s just really hungry to succeed.

"I thought, with the nature of the game and the way they were playing, pushing him on with Kyogo could really put some pressure on with his penalty box presence. That’s what he did, not just the goal he scored, but every time the ball went into that area he was there.

“He’ll take a lot from that goal and go away with the national team now, come back to us and hopefully kick on.”

Yes, it was the day Oh Hyeon-gyu announced his arrival for real. If he has found his shooting boots at Celtic you just might find that a Seven Nation Army couldn't hold him back.

"Oh, Oh, Oh, Oh, Oh, Oh, Ohhhh!"

It's a rather catchy wee ditty, isn't it? Fear not, it will be coming to a Scottish football stadium near you soon enough.