But Serena can't really say that she's "always been very happy to answer any question about that."

The only other time Serena was asked about those T.U.E.s, soon after their release in the fall of 2016, she responded by walking out of a French TV interview. pic.twitter.com/p6YMLAkQ8X

— Ben Rothenberg (@BenRothenberg) March 9, 2018