By Daniel Orme Manchester City star Erling Haaland was slapped in the face by the referee against Real Madrid, triggering a grovelling apology. The Norwegian was named in City’s starting line-up for the trip to the Bernabeu and endured somewhat of a frustrating evening. His anger grew after a tricky first-half. French referee Francois Letexier threw his arm out at half-time, accidentally catching Haaland square in the face with the back of his hand. The striker threw his arms up in response and turned around to look at the official. That triggered a swift apology from Letexier, who assured the…