Wild prediction that I'll probably regret throwing out there but when we played Palace at home and we went 2 down, Pep adjusted the setup and the left back in the three was Foden. It didn't get a lot of attention because it's not been repeated but I remember Dias pulling him round like he was on a piece of string and him being in the right spot to cross for Haaland's 2nd or 3rd (the header).
Laporte would be a more conservative or conventional choice but given Saka's pace I wouldn't be surprised to see Foden in that slot tomorrow.