Mauricio Pochettino has been pretty much inscrutable since he arrive in the Premier League in January 2013. He's barely said a word out of place.
Then, on Friday he launched his pointed attack on Pep Guardiola, something you feel might have been simmering for some time.
And Sunday brought extracts from his new book, Brave New World, serialised by Sportsmail, in which the tough love he showed to Harry Kane and Dele Alli is described. We had more from him in 48 hours than we had previously had in four year and nine months.