I'm not worried.
Declan and Saka are troopers, they'll be ready to play.
Would imagine we'll see Jorginho (fit/rested) at the base of the midfield to start the year. He's the type of player who keeps a relatively high floor and will build your team's foundation. From there we can introduce Merino and customize Rice's role so find our ceiling.
Odegaard will also be well rested, so we can help ease in Rice with limited minutes.