The London club has made some big moves in the transfer market.
Newcastle was promoted to the Premier League on Monday.
Pérez has not pinned down a starting place at Arsenal.
Guardiola has faced a difficult period in charge of City.
Guardiola's team faces a fight to make the top four.
Pogba has begun to dominate recent games.
Rashford and Martial are struggling for game time at Old Trafford.
Sanchez scored three and set a goal up for Mesut Ozil.
Arsenal kept pace with Premier League leader Chelsea.
Stoke City manager said the pitch was too slow for good football.
There has been tension this season between the old Upton Park regulars who want to chant and those fans looking for a more family-friendly environment.
West Ham has had crowd problems since moving into the stadium.
Southampton secured an emphatic victory in east London.