Alternatively, you could have Schick instead of Mahrez in a 4-3-3. Van Dijk, N'Zonzi and Schick would be a pretty good blend of physical presence and technique.
-----------------Cech
Bellerin - Van Dijk - Kos - Kolasinac
---- N'Zonzi -- Özil -- Xhaka
---Schick -- Lacazette -- Alexis