Last night, Barcelona won their first La Liga match against Mallorca. I think the match was too easy for Barcelona, because in that match, Barcelona really controlled the game from the first minute until the last minute of the second half. Mallorca's players really struggled in this match, especially in this match, two of their players received red cards and this of course weakened their squad even more. That's why Barcelona played this match really like a friendly match.
Rashford will only replace Raphinha if Raphinha has fitness problems because it is clear that Raphinha will not be replaced when he is fit, but initially I thought that in this match when Lewandowski was not in the list, his position would be replaced by Rashford because he could also be placed in that position, but Torres' name came out as a starter, maybe Flick still didn't trust him enough. What is clear is that this match was a good start for Barcelona because they won very easily.
Rashford is far under Raphinha in quality and he must be careful of young players in Barcelona who are able to put Rashford down on substitution list. He can be used as a substitution for Raphinha some times but he must perform well with given chances. Otherwise, I believe that Rashford will no longer get opportunities as one of first substitutions in Barcelona even in matches with small clubs.