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If he plays at any reasonable point during the game, the chances are Manchester United striker Javier 'Chicharito' Hernandez will score, and it'll be a header.
He's done quite well this season scoring three league goals in four starts, and against Manchester City's defenders he has all the attributes to be a goal threat.
City's tall defenders like Vincent Kompany and Joleon Lescott aren't troubled by much, apart from small, speedy strikers who are a nightmare to man-mark, and that's exactly what Chicharito is.
He'll most likely take up positions between defenders to try and get a free header, which almost half his goals for United have been.
And considering United's main wingers, Ashley Young and Nani, have eight assists between them and together make five key passes and put in three accurate crosses per game, it should be easy enough for the young Mexican to get the right service.