FA Cup holders Arsenal were stunned 4-2 by second-tier Nottingham Forest in the third round on Sunday.
Eric Lichaj scored twice for the hosts either side of a Per Mertesacker equaliser to give Forest a 2-1 halftime lead.
Ben Brereton made it 3-1 from the spot in the 64th minute before Danny Welbeck pulled a goal back with 12 minutes left but Forest were awarded another penalty which Kieran Dowell converted.