article_snippet.sent: The afternoon started so well for Sergio Aguero and Manchester City when Sergio Aguero opened the scoring after just eight minutes .
article_snippet.sent: Sergio Aguero celebrates Sergio Aguero 99th goal for Manchester City with David Silva as De Gea looks dejected .
article_snippet.sent: The aftermath of a crushing derby defeat at the old enemy may not be the place for jelly and ice-cream but the Argentine's tremendous feat of scoring 100 goals in just 158 appearances should be cause for celebration.
article_snippet.sent: Aguero netted Aguero 100th goal for Manchester City in the 89th minute but there was no cause for celebration .
highlights_snippet.sent: Argentine scored a brace against Man United to take Manuel Pellegrini tally for Manchester City to 100 .