TEL AVIV, Israel — Regal Barcelona put on a defensive clinic in Tel-Aviv against Maccabi in a round of 16 showdown between two of the powerhouse teams in the Euroleague. Barcelona’s stable of big men and heady guard play were too much for Maccabi to overcome, giving the Spanish squad a big 71-57 road victory. Barcelona’s frontcourt features two NBA prospects in Erazem Lorbek and Fran Vasquez, whose combination of size and skill was too much for Maccabi. With Sofoklis Schortsanitis