The Mavericks on Sunday departed Dallas, without Luka Doncic, to face a Milwaukee team that has won 18 straight games and 22 of its last 23. Even so, the Mavericks as a franchise breathed a collective sigh of relief. The right ankle sprain that Doncic suffered Saturday night was diagnosed, according to a Mavericks source, as “moderate.” The source told The News that Doncic almost certainly will miss Dallas’ four games leading into Christmas, but might be able to return soon after that.