Arsene Wenger has described Arsenal's weekend as "a major set back" and a "big worry."
The Gunners were beaten 1-0 at Stoke on Saturday. The result saw them fall to third in the table, level on points with second-placed Liverpool and four adrift of Chelsea, who beat Fulham.
Asked how difficult it will be to close the gap between them and Chelsea, Wenger said:
The Frenchman also defended criticism of his team dipping in form towards the end of campaigns: