Spurs big man Tiago Splitter committed a turnover, nearly committed another, and has been punished defensively in the beginning of the second quarter. His combined defense with Boris Diaw (as Tim Duncan gets a breather) has been laughable. Serge Ibaka hit a wide-open jumper, Thabo Sefolosha and James Harden have scored buckets at the rim without much contest. Splitter has been more than passable so far in this series — especially in the Spurs' victories — but he's been an absolute negative in Game 4.
Unsurprisingly, Duncan replaced Splitter after the next timeout.