They almost went further behind but Kiely tipped over a flicked Torres header form a Gerrard cross.

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Those add-ons connect with standard header pins and can take the form of anything from a processor to sensor arrays.

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And the Blades began in determined form, veteran midfielder Gary Speed seeing a header deflected over the top and Rob Hulse shooting high and wide.

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Form a corner kick, Naismith crashed a header against the crossbar, Kyle Bartley's follow-up effort was scrambled clear before Edu's prod was stopped illegally by the PSV midfielder standing by the post.

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The Brazilian's form in front of goal has often been less than top quality, and his misdirected header when totally unmarked will not have boosted his chances of remaining at Arsenal after this season.

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Indeed, the Pole may earn first-choice status if he continues the form that saw him make two great saves from a Marcus Berg shot and a David Rozehnal header.

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