no idea who they are
The 71-72 LA Lakers had a longer winning streak, according to Wikipedia.
I sometimes watch WTT and it's not that bad, but it's definitely a glorified exhibition for the pro-players who participate. The Kastles have a lot of good players with both of the Williams sisters, Paes, and Reynolds, but this tennis league is probably not even as good as the German Bundesliga.
i've never watched WTT, when i tried to do that, it did not work... their Streaming is blameworthy.
Anyway, their streak seems to be incredible. It's great that they are winning from so long.