Pep Guardiola wants his Manchester City stars to avoid giving away cheap set-pieces at Old Trafford for fear of being toppled by Jose Mourinho's United giants.
City have conceded twice from set plays in the last week, from a throw-in against Southampton and a corner during the late win over West Ham.
And Guardiola is mindful of the aerial bombardment coming his defence's way in Sunday's derby.
Romelu Lukaku, Nemanja Matic and Chris Smalling dwarf their City counterparts, with Zlatan Ibrahimovic also primed for a comeback.