Mikel Arteta’s problems keep on mounting. In the week that they were rocked by the surprise resignation of sporting director Edu, Arsenal surrendered their unbeaten record in the Champions League after Hakan Calhanoglu kept up his record of never having missed a penalty for Inter to score the only goal of a tightly contested game.

It was an exasperating occasion for Arteta, who was booked in the second half for handball and came close to being sent to the stands as his side searched for an equaliser. But despite a much-improved second-half display that saw the visitors rack up 13 corners to Inter’s none, they sank to a second successive 1-0 away defeat.