Perhaps Christos was responding, in part, to tweaks Denis Istomin made about his kin. Istomin, upon losing to Kyrgios in a Davis Cup match in Australia this month, said, "He has a big future like I see it but I think maybe he can be a bit more mentally strong because sometimes he can go up and down. I felt that when I played him today. In some games, I had chances to break him, and if I was a little bit healthier, maybe I take those chances."
Not exactly stark criticism, and likely not what catalyzed the elder Krygios brother's angst, but suffice it to say that this family, in an era of gentlemanly conduct, makes the ATP World Tour (also known as "a game filled with zombies and stiffs") more interesting.
What do you think of Christos' outburst on Facebook? Do you think the ATP has a dearth of appealing characters or that his comments missed the mark? The Spin has a two-word rebuttal: Monfils, Gael. Okay, two more: Dimitrov, Grigor. And the beat goes on.
Got a tip or a point to make? Hit me on Twitter at @jonscott9.