Perhaps one of the most exciting periods of the year for football fans has finally arrived: the summer transfer window. It officially opened this morning, with clubs across Europe preparing to do business.

At Celtic, as ever, it is expected to be a busy few months. Brendan Rodgers has a fattened squad which needs trimming, but there are also key gaps in his team that need to be strengthened with additions of a high-calibre.

Last summer, the club made the mistake of bringing in quantity over quality. Nine players were signed, but arguably only two – Paulo Bernardo and Luis Palma – became consistent contributors throughout the campaign.

The errors of the previous recruitment team are still evident, and they have to be patched up this summer.

Rodgers needs to get rid of sub-par players who he doesn’t deem good enough, while also addressing some key positions in his team. Goalkeeper, centre-back, left-back, midfield, and attack are all areas that need looking at over the coming weeks.

Building on a double-winning squad and moulding it into one which can maintain domestic dominance but also compete in the newly formatted Champions League has to be a priority.

Securing the long-term futures of Bernardo and the influential January loan addition of Adam Idah could be critical but if neither is signed permanently, other targets who can make similar impacts must be identified.

The next few months will be key yet telling at Celtic. With vast funds in the bank and an elite manager who needs to be backed, there is no excuse for the club to push on this summer and reinstate their status as Scotland’s dominant force while also making a mark on the continent.