Mikel Arteta hailed Thomas Frank as "extraordinary" after he was dismissed by Arsenal's arch-rivals Tottenham - but admitted: "We're all vulnerable to the sack."Frank was sent on his way by Spurs after just eight months in charge, meaning they are likely to have a new man in the dugout for the visit of Arsenal in the north London derby a week on Sunday.

Mikel Arteta hailed Thomas Frank as "extraordinary" after he was dismissed by Arsenal's arch-rivals Tottenham - but admitted: "We're all vulnerable to the sack."Frank was sent on his way by Spurs after just eight months in charge, meaning they are likely to have a new man in the dugout for the visit of Arsenal in the north London derby a week on Sunday.