Declan John's decision to move to Rangers in the summer resulted in a few raised eyebrows. He was frozen out at Cardiff City under Neil Warnock and told to find a new club. Rangers are no doubt an attractive proposition but any left-back arriving at Ibrox would be behind Lee Wallace, the club's captain, in the pecking order.

On paper, it wasn't a move that would result in John having an extended run in the starting XI unless Wallace was injured. It was a gamble for the 22-year-old Welshman. To develop, and potentially force a permanent move away from the Cardiff City Stadium, he'd need to be playing regularly.

However, John now has an ideal opportunity to make the left-back role his own with Wallace ruled out until November with a groin injury. In only his second start for the club in the Scottish Premier League, John played a pivotal role in Rangers coming from behind to beat Hamilton Academical.

The left-back scored twice in five minutes to cancel out Danny Redmond's second-minute opener. Even without the goals, he put in a performance which must have left many Rangers fans rueing the fact he wasn't fit enough to start the Glasgow derby last weekend.

Lee Hodson started at left-back in the 2-0 defeat to their city rivals, with Patrick Roberts terrorising him.

But, after witnessing the show John put on during the win on Friday, you can't help but feel he could've handled the on-loan Manchester City attacker a lot better, and the end result could have been different.

While it would be knee-jerk to suggest John should immediately be Pedro Caixinha's first-choice left-back ahead of Wallace, the Welsh full-back did make quite the impression, and there are reasons to imply there's a long-term future for him at Ibrox.

John the modern-day full-back 

Gone are the days a full-back is judged primarily on what they do in the defensive third. It's all about what influence they have in the attacking half, and anything they add defensively is just a bonus.

However, while many full-backs try to adapt to the rigours of the modern game, sometimes they're out of place and it's like playing a square peg in a round hole. They have no composure in the final third, they do everything they can to avoid being in possession in the attacking half and a lot of the play breaks down when it reaches them. Yet managers persist because that's what's in fashion right.

Much to the benefit of Rangers and their play, John is different. He's all of the things a manager wants from a modern full-back and then some: He's intelligent, composed, comfortable in central areas and he can use either foot.

In the above picture, taken in the build-up to the Rangers' equaliser, you see John in possession of the ball. Many in this scenario would drive into the wide area, isolate the man fronting him up and cross the ball into the box.

After all, Rangers do have four men looking to get on the end of it and John has a lot of space to work in.

He doesn't do that, though. Instead, the on-loan Cardiff man cuts inside and drills a right footed effort into the bottom corner. You can tell from the shape of the Hamilton man closest to him that he expected him to drive to the byline and cross the ball in. He's scrambling to get into a position to block the shot.

This time around you see John in the penalty area. He could pull the ball back to the man free in the box, shown by the white arrow, but instead dips his shoulder and drives to the byline. He's fortunate that the keeper isn't able to keep the ball out but he makes the most of his opportunity.

It also shows just how unpredictable he is as a left-back. He can go inside or outside and use either foot, meaning the opposition are forever second-guessing about what to do when he's running at them.

Yes, from time to time he'll make the wrong decision and shoot when he should pass, but you don't want to take that part of his game away from him so you have to indulge him.

The above doesn't result in a goal but you get to see what else John brings to the table. He was playing at times like an inverted full-back, with Josh Windass keeping the width on the left. It meant he could drift inside and influence the game from there. He did just that.

He cuts inside and plays a reverse through-ball with his right foot to Alfredo Morelos. It hits the prolific Colombian and the chance is wasted. The defensive line from Hamilton isn't the best, but that's because of how Rangers have positioned themselves.

The pass may have been obvious but John plays his part superbly. On another day, Morelos races clear and slots home.

The benefit to him playing is evident and if he continues as he started it will be hard for Wallace to displace him when he returns. In John, Rangers might have a serious player on their hands.