Chael has been making a number of comments about Tito's fight with Chuck and these have clearly irritated Tito. So Tito called out the American Gangster on Twitter.
The interesting thing here is that shows the state of MMA. Just days ahead of a great UFC card the interest is in the past, and not the present. The media is talking about Tito and Chael more than Max, Brian, Valentina, or Joanna.
The reason for this is that the novelty of MMA has worn off. The general public is interested in stories, and personalities, rather than some of the most skilled fighters on the current roster.
The Pay per View numbers for UFC 231 are going to be telling.