The big difference between him and Olsen is that he’s 19 and just starting out, you wouldn’t expect him to be the finished article for years and you expect mistakes. Olsen is 30 and and International, he’s not going to get any better and should have ironed cock ups (or certainly regular ones) out of his game years ago. Olsen was fine on his last outing but prior to that was actually not as competent as Marchall the other night in the vast majority of his other games.
It’s encouraging to hear that we have a possible future England keeper on the books and let’s hope that will be the long term successor to Martinez.