Jose Mourinho has unexpectedly entered the conversation for Celtic's permanent managerial role, despite Ange Postecoglou remaining the favorite for a Parkhead return. Reports suggest the Portuguese coach could leave Benfica before the World Cup, creating a potential opening for the Scottish champions to make a high-profile appointment.

Celtic face competition from Juventus for RB Leipzig midfielder Xaver Schlager, who becomes a free agent this summer. The 28-year-old Austrian's potential arrival would bolster either club's midfield, with the Serie A giants currently leading the race. Meanwhile, Stephen Welsh's last-minute loan return to Motherwell highlights Celtic's defensive roster adjustments.

In other developments, Rangers aim to retain 19-year-old midfielder Bailey Rice despite Premier League interest, while Exeter City's Gary Caldwell emerges as a candidate for Wigan Athletic's vacancy. Celtic's Europa League opponents Stuttgart have taken unusual measures by granting players extra rest before their decisive playoff clash.