sentences:  The men's fourth round line-up was completed and the women's quarterfinal began to take shape.Carlos Moyà, David Ferrer, Juan Mónaco, Novak Djokovic and Rafael Nadal all expectedly made it through in the men's bottom half.Ernests Gulbis became the first Latvian player to make the fourth round of the US Open when he upset eighth seed Tommy Robredo in straight sets and Juan Ignacio Chela got his first ever victory over Ivan Ljubičić.