"It's that Latino temperament," Beglin said, as Di Maria, an Argentina international midfielder, walked off the field.
Moments later, Beglin apologised for using the term.
"When Di Maria was sent off, I described it by using the word Latino. For anybody that's taken offense, I do apologise -- sincerely apologise."
Beglin tweeted a longer statement after the match, saying:
"I apologise for my culturally insensitive remarks during the Champions League tie between Manchester City and Paris Saint-Germain. I wrongly used a racial stereotype. This was inappropriate and unacceptable. Words have a strong impact, and I fully understand the severity of what I said when Angel Di Maria was sent off. I will learn from this and be better moving forward."
CBS has not commented regarding Beglin's remarks.