The English transfer window has slammed shut but Arsenal have just received a last-gasp offer for a first-team star. Arsenal have been busy thinning their squad in the transfer window this summer with five players leaving permanently and five more leaving on loan. The Gunners completed deadline day deals for Raheem Sterling and goalkeeper Neto, while Aaron Ramsdale, Reiss Nelson and Eddie Nketiah all completed moves away from North London. Manager Mikel Arteta claimed he was “happy” with his squad as the window closed, adding that he is working with a “magnificent group of human beings”. Howev…