article_snippet: Antonio Valencia's short backpass gave Danny Welbeck's the chance to score Arsenal's winner by rounding David de Gea, and the former United captain
article_snippet: A poor defensive showing from United allowed Nacho Monreal to score Arsenal's first-half opener .
article_snippet: Valencia was also at fault for Arsenal's second, laying a goal on a plate for former United striker Danny Welbeck with a under-hit back pass to David de Gea.
article_snippet: (Phil) Jones, there's a time to clear, David de Gea can do better and Valencia of course is compounding from the first goal.'
highlights_snippet: Nacho Monreal scored  after a run from Alex Oxlade-Chamberlain .
  
highlights_snippet: Antonio Valencia then played a poor backpass for Danny Welbeck's winner .