Here's a illustration of how the triple post offence works.
http://www.coachawinningteam.com/basketball_play_triangle
I'm no basketball expert, but somehow I felt there are similarities to what Kuyt and Arbeloa have been doing on our right hand side...
I used to play basketball professionally. Triangles are obviously apart of football, but to compare the "triangle offense" in basketball to Arbeloa-Kuyt-Torres for us would be far-fetched. Basketball is a totally different ballgame because you can score on different angles, if your low post option is heavily guarded you can kick it out for a corner three. There are no such options in football. The only similarity is in spacing, which has been a fundamental in football forever. Triangles create space.
The best way to compare football and basketball would be to compare styles of play, fastbreak basketball would be counter-attacking football and half-court sets in basketball would be possession football in the oppositions half.
Xabi would be your half-court point guard. Reads the game well, can see options unfolding, a general of sorts, etc.. A fastbreak point guard always tries to make himself the first option after the rebound or inbound, sets a high pace by pushing the ball up through the middle with 2 options (hopefully) either side. Xabi taking the ball of our centre midfielders could be considered similar, but there is that lack of pace that sets it apart from fastbreak basketball.
I'm not sure how useful comparing the two sports would be. The games are very different and it's only the fundamentals of each sport that you can really compare. Need to form space, movement, etc.. The different dimensions of the playing areas, different scoring, etc., make the approaches hard to compare. Basketball at the top level can also be a lot more individual, with isolations working because of the lack of defenders and rules to stop clogging the basket area.