The extended international break came at the worst possible time for Glasgow Rangers because they are currently on a phenomenal run of form under Derek McInnes.

Their 1-0 win away at Celtic in the Scottish Premiership extended their winning run to six matches in all competitions, and they kept five clean sheets in those six games.

Some of the club's summer signings are starting to prove their worth on the pitch, including the likes of Olwethu Makhanya, Ivor Pandur, James Penrice, and Dan Neil.

However, there are still some of the players brought in over the summer who are yet to show that they have what it takes to make it at Ibrox in the long run, including Cammy Devlin.

Cammy Devlin may not have a long-term future at Rangers

The Australia international was brought to Ibrox on a free transfer from Hearts in the summer transfer window after his contract at Tynecastle expired at the start of July.

It was a move that made sense in theory more than in reality, because he joined as a player who had already worked with McInnes last season and could, in theory, hit the ground running.

However, Devlin is a known quantity in the Scottish Premiership and the Gers should have known that his lack of quality in possession would have been a problem.

The experienced midfielder provides strong defensive attributes on the pitch, winning the majority of his duels, but Rangers are a dominant force domestically and need players who offer technical and physical qualities.

His struggles on the pitch have already led to him losing his place in the starting line-up, as evidenced by his 14 minutes played across the last four games in all competitions.

Devlin only signed a two-year contract when he joined the club in the summer and it already looks like he may not have a future beyond that deal, because he does appear to have the qualities that are needed for a Rangers central midfielder.

Worse Rangers signing than Devlin is set to leave

The former Jam Tarts star is not the only player who has been signed because of their experience in Scottish football and failed to make the grade at Ibrox.

In the summer of 2022, Rangers swooped to sign central defender John Souttar as an experienced and proven Premiership performer, having played 162 times for Hearts, and he had already been capped by Scotland.

Unfortunately, the Scotland international has been part of one of the club's driest spells for trophies in the top-flight, winning one League Cup in four full seasons at the club.

Souttar joined after Giovanni van Bronckhorst won the SFA Cup and reached a Europa League final, and the Gers have not seen as much success as that since his arrival as a centre-back.

Four years on from his move to the club, Football Insider reports that the defender is set to leave Ibrox in the January transfer window because he is not a part of McInnes' plans and is ready to agree to move to a new team.

The Scot wants to leave the club to find regular game time elsewhere, which is understandable, and Rangers must cut ties with him after his disappointing performances last season.

Rangers conceded ten goals in Souttar's last five league starts for the club in the second half of last season, as the team looked too open at the back when he played.

McInnes opted to revamp the defence and push him down the pecking order over the summer, and the Gers have now kept five clean sheets in their last six games, most recently against Celtic.

Souttar has been a disappointment overall at Ibrox because he has been part of a disappointing Rangers era and the team now look better without him in the side after four seasons of being a regular.

The Scotland international reportedly earned around £2.2m between the 2022/23 and 2025/26 campaigns, and is currently on £18k-per-week in the current season.

He has been a far worse and more expensive signing than Devlin may end up being, as the Australian midfielder is set to earn just shy of £460k on £4.4k-per-week from his two-year contract at Ibrox as a squad player.

In truth, the Gers have been rather fleeced by Souttar because they have shelled out millions in wages on a player who has been deemed not to be good enough for the club after failing to help the team to achieve success on the pitch over the course of four seasons.

Devlin and Souttar are both proof that being 'proven' in the Premiership does not mean that the player is guaranteed to be a success at Rangers, and that is a lesson that they could learn from moving forward.