(Andy Rain, Pool via AP)LONDON At least David De Gea was spared having a crowd inside Wembley to witness his latest mistakes in the Manchester United goal. Gifted goals to beat United 3-1 on Sunday, Chelsea will be returning to the national stadium on Aug. 1 to face Arsenal in an all-London FA Cup final. Olivier Giroud's close-range deft touch from Cesar Azpilicueta's cross was pushed into his own goal by De Gea. De Gea hadnt played in the competition since the 2018 final when Chelsea beat United. It means Frank Lampard's first season as Chelsea manager will end with a cup final.