It has two by-lines, there'll be some truth in it, at least as the Marca editor is concerned.
Contrary to popular belief, hacks don't make up stories. If they put their names to complete bullshit, they get warned then sacked, simple as that.
If you see "Mailsport" or somesuch as a byline it means they've cribbed it from the internet and want to fill some (cyber-)space. If they put a name to it it means the journo in question has sold the story to the editor, who will have asked them straight off "Where does this come from?"
Miguel Angel Lara has worked at Marca for 24 years, Juan Ignacio García Ochoa for 10. You don't stay that long at Spain's biggest selling paper if your some chancer