If they can win at Old Trafford, a top four challenge could be on the cards - defeat and back to being an also-ran beckons. striker-wise, signed only Lucas Perez from Deportivo la Coruna in the last transfer window. Getty Images11Wayne Rooney has been out of sorts all season for Manchester United – is it time. n to captain the GunnersKolo Toure – £150kAnother player who became a cult hero with Arsenal fans, Kolo Toure, signed for an incredible £150,000 from?Abidjan outfit ASEC Mimosas, he forced a mean centre-back pairing with Sol Campbell that helped “The Invincibles make history. cardVan Nistelrooy eventually stepped up and crashed his effort against the bar. Thierry Henry won it for Arsenal with the last kick of the game — and it was the only time Fergie ever conceded a last minute winner. itle winning season, and two defeats already this season have served to highlight the challenge. But Wenger saw something in Henry that others hadn’t, and immediately turned him into a centre forward. EPA5Karim Benzema has long been admired by Arsene WengerGetty Images5The French striker is a £40million Arsenal targetBut there are a few stumbling blocks. 8211; and what a signing he turned out to beGranit Xhaka scores wonder goal for Arsenal against Hull CityNicholas AnelkaThe young Frenchman was signed from Paris Saint-Germain for just £500,000, and ended up making huge profit when sold two years later to Real Madrid for £22.