Despite dominating 78 ball possession, United could not salvage a point against Palace on their home turf.
However, Martin Odegaard put Arsenal ahead, converting a penalty in the 53rd minute after Sam Johnstone brought Eddie Nketiah down in the box.
The Red Devils are now back to the European top tier competition after missing out last season.
But Rodrigo would score less than 60 seconds after to net a consolation for Sam Allardyce’s side.
Club chairman Aiyawatt Srivaddhanaprabha said in a statement that the club’s performance this season was below expectations.
Match officials have been issued guidance so players can break their fast on the touchline during a pause in play.
Crystal Palace have announced the appointment of former coach Roy Hodgson as the new manager of the first team until the end of the current season.
Crystal Palace on Friday sacked manager Patrick Vieira after 20 months in charge.
Erling Haaland scored the only goal as Manchester City managed to secure a narrow one-nil victory over Crystal Palace.
The 27-year-old forward was pictured holding a bowl containing fish and some vegetables.
