"Playing it fast & loose w/the journalism @RobDemovsky. Your professional skills are lacking... you must be having personal problems at home," Munn tweeted.
Demovsky had published an article earlier in the day with the headline "Five reasons why Packers quarterback Aaron Rodgers is struggling." The reporter cited the loss of No Nelson, less free plays, play-calling changes and injury before naming Munn.
"A longtime NFL agent told me recently that when he sees one of his top-performing clients play differently, as Rodgers has of late, the first thing he wonders is if something is going on in his personal life," he wrote. "There's no indication that Rodgers' relationship status has changed."
"Lions reporters said they spotted Rodgers' girlfriend, actress Olivia Munn, at Lambeau Field on Sunday," he added. "Sometimes it's easy to forget that professional athletes have lives away from the field, and you never know what could be going on in their personal lives."
Munn and Rodgers have been together since 2014, and live together in Green Bay, Wisc., during the NFL season. The actress is known for playing Sloan Sabbith on HBO series The Newsroom, and will portray Psylocke in X-Men: Apocalypse.