Just because they have subs for derke, they have to play with subs. like if H1ber didn't go to Iceland i believe derke would play. But they didn't know if derke is getting a negative test and come to Iceland before tournament starts, so they had to find another sub and fly with him to Iceland.
Like H1ber already went to iceland then derke tested negative he also flew to Iceland but just because he has a sub for him fnatic needs to play on stage with HH1ber
i believe thats the case, i feel like derke should have played from his room which he deserved because he carried his team Masters