Novak Djokovic and Andy Murray have moved into the third round of the Cincinnati Tennis Open with relatively comfortable straight set victories.
World number two Djokovic overcame Italian Andreas Seppi 7-6 6-2 while Olympic gold medalist Murray beat American Sam Querrey 6-2 6-4.
There was better news for another American, Mardy Fish, who beat Argentine Carlos Berlocq 6-3 6-1.
But James Blake made an early exit after 22-year-old Japanese Kei Nishikori recovered from a poor first set to beat the American 2-6 6-4 6-4.
Argentine Juan del Potro battle past German Tommy Haas 7-5 6-2 and while Australian Leyton Hewitt was was crushed 6-2 6-0 by Serb Viktor Troicki.
Swiss world number one Roger Federer is in action later against Russian-American Alex Bogomolov Jr.