Celtic's readiness for another UEFA Champions League campaign is under the microscope, with questions swirling around manager Martin O'Neill's squad depth and transfer priorities as the summer window approaches its close.

The Scottish club appear on the verge of securing their place in the group stage, but analysts and supporters alike are asking whether the current squad possesses enough quality and strength in depth to genuinely compete on all fronts — domestically and in Europe.

Full-back crisis deepens

One of the most pressing concerns centres on the right-back position. Alistair Johnston's confirmed lengthy absence leaves a significant gap, and attention has turned to Colby Donovan as a potential long-term solution. Whether Donovan can fill that void consistently across a congested fixture list remains an open question.

Celtic must also decide how to approach the second leg of their UEFA Champions League play-off tie away to LASK. Holding a healthy aggregate lead, O'Neill's side face a tactical dilemma — push forward early and kill the tie off, or adopt a more conservative approach to protect what they already have.

Transfer window pressure mounts

With the window set to slam shut, Celtic's recruitment team are under pressure to add the right personnel before it is too late. The coming days could prove crucial in determining whether the club arrives at the group stage properly equipped or stretched dangerously thin.

The debate around Celtic's European readiness was explored in depth on BBC Radio Scotland's Scottish Football Podcast, where David Currie, Cillian Sheridan, and Gordon Waddell weighed up the challenges O'Neill faces heading into what promises to be a defining week for the club.