Although midfielder Alexander Hleb may be out for a few weeks after receiving a nasty leg injury, Arsenal are still on top of the Premier League with a 1-0 victory over London rivals West Ham United. The Belarussian international was stretchered off mid-way through the first half at Upton Park after being felled by a crude, shin-high lunge from Mark Noble. Arsenal coach Arsene Wenger was livid at the press conference as Nobel only received a yellow card for the tackle. Hleb left Upton Park on crutches and has been ruled out of Tuesday’s Champions League encounter with Steaua Bucharest, although speculation last night that he had suffered a broken leg proved unfounded. Robin van Persie’s well-taken 13th-minute goal, the Dutchman nodding in at the far post after Hleb had crossed from the right, maintained Arsenal’s 11 match unbeaten run and ensured that they stay on top.