Our instinct is that the prospect of buddying up with a US media giant is a more compelling one for BT, over an all-out sale to rival sports platform DAZN. However, things are seldom this simple and of course competition regulators would want to have a thorough look at market implications. Getting greenlights from the relevant European authorities shouldn’t be too much of a problem given BT Sport’s focus on soccer and rugby, while Discovery’s sports platter is currently limited to Olympics Games coverage – for which it holds long-term rights in Europe. Meanwhile, DAZN’s primary pull is boxing, while the sports streamer has been aggressively bulking up on soccer rights, although not entirely successfully as we have seen in…