"WHAT?! AGAIN? Sorry, guys, still not dating Ernesto Arguello," the former "Desperate Housewives" star tweeted after a supermarket tabloid reported that she and the civil and architectural engineer were a couple. "Who are these 'sources'??" she asked.
Additionally, Longoria's representative told E! News Tuesday, "Eva is not dating Ernesto. She is friends with all of the guys and matchmakers from the show, but nothing further."
Without specifying whether they are a couple or simply friends, TMZ.com reported Tuesday that Longoria, 38, and Arguello, 33, were together at the Chateau Marmont in Los Angeles Sunday night and at the private club Soho House West Hollywood on Monday.
The site also reported that both Arguello and fellow "Ready for Love" bachelor Tim Lopez, of the band Plain White T's, were staying with Longoria at her home.
Despite reports that "Ready for Love" has been canceled after three episodes, NBC has said only that the supernatural drama "Grimm" was taking its Tuesday 10 p.m. time slot beginning April 30.
A two-hour episode of "Ready" was scheduled to air Tuesday night.
The show, Longoria insisted in a tweet Monday night, is "Just changing days!"