By Daniel Chavkin The Portuguese forward appeared to slam a fan’s phone in frustration after a match. View the original article to see embedded media. After Manchester United lost 1-0 to Everton on Saturday, footage appeared to show Cristiano Ronaldo slapping a phone out of a fan’s hands while walking off the field. Fans seemed to be heckling Ronaldo while Manchester United walked off the field, and Ronaldo appeared to be frustrated in the video. ESPN reports Manchester United is investigating the situation, but the club said it is unsure as to what happened. Man U currently sits in seventh pl…