For Google Adwords re-marketing, display ads are shown to visitors have been to your site previously. So when the go to a web site displaying AdSense, it is likely that re-marketing ad will be displayed to them.

Is there a way to do the same for if a visitor has visited a competitors site. i.e. if a visitor goes to one of my competitor sites, I want the display ads they see, to be mine.

Is that possible?