Yahoo Sports reports: The big question hanging over Crystal Palace currently is not who'll be in the squad next season but who'll be in the dugout. It's unlikely the Eagles will make any moves until a successor to Oliver Glasner is found – and the new man in has big shoes to fill. Glasner's success was built on a system utilising a back three and if Palace's next appointment opts for continuity, he'll need reinforcements at the heart of defence.