GVA was probably paying the price for being caught behind the early crash, and having to chase hard to get back into the peleton before Arenberg. That said, it's his own silly fault for being caught at the back of the peleton in a race as crash-prone as Roubaix.Sagan makes it look so easy, so it easy to be fooled into thinking they could have chased him down, my bad.
Terpstra did look the strongest of the chasing brigade. GVA looked like he was hanging on by a fingernail for most of the chase.