As a key member of Ole Gunnar Solskjaer's backroom staff – and a former lead coach of the Under-18s – the 33-year-old has had a front-row seat from which to watch the pair's development in recent years.
And McKenna says their mental resilience and composure – even beyond their technical and physical attributes – are the main reasons they've made a seamless transition to top-level football during 2019/20.
“You need to have stand-out attributes physically and you need to have stand-out attributes technically to be able to be in consideration,”
began the Northern Irishman, during our latest MUTV Group Chat, hosted by Stewart Gardner.