Round 1: Neji wins low-mid (unless beast transformtion counter-clockwise can match and disperse Kaiten rotation. Actually, Kiba should be able to dig underneath Kaiten, shouldn't he? Help!)
Round 2: Juugo wins (Juugo overpowers Neji with speed and power)
Round 3: Sai wins mid-low. (Mogu counters Kaiten, and beast imitation spam overwhelms Neji not by quantity but by size. Going against Kidomaru shows that he can handle a large amount of projectiles at once, but I doubt he can hold off large projectiles like Sai can create, and Neji can't spam Kaiten fast enough or long enough to destroy them all. Well, it really depends on the range. Neji wrecks at close range, as he is faster and more versatile then Sai. Sai wrecks at long range...)
Round 4: Neji wins mid-high dif (CQC fight, Asumas Hien will give him some trouble)
Round 5: Neji wins mid-low dif.
Round 6:Kakashi wins mid diff (Shunshin and Chidori destroy. Kaiten reaction feats aren't good enough to keep up with Shunshin.)
Round 7: Hidan wins mid-high dif (I think)
Round 8: Neji wins high dif (could go either way)
Round 9: Sasuke low dif.
Round 10: Kakuzu low difs