Yes, hence 3rd string. Meaning in the absence of Gundogan and Rodri ( a highly unlikely scenario, he'd get to play there.He wasn't intended to be 3rd string DM at all lad. That's why aside from last night he hasn't ever played there except a few forays forward now and again.
That's what happened last night. Pep rested both guys who logged 90 minutes the prior game. And put in the defacto 3rd stringer in Dihno.