By Simon Evans
MASON, Ohio (Reuters) - France's Gael Monfils and Gilles Simon suffered early exits from the Cincinnati Masters on Tuesday.
Fish produced a spirited display to defeat Simon 7-6 7-5 and set up a match with Spanish eighth-seed Fernando Verdasco.
Monfils, the 16th seed, fell to Colombian qualifier Alejandro Falla 6-3 6-4 while Blake's slide down the rankings continued with a 6-3 6-0 loss to Russia's Denis Istomin.
Czech seventh seed Tomas Berdych, who pushed Roger Federer all the way in his quarter-final loss to the Swiss player in Toronto last week, begins his campaign against Frenchman Paul-Henri Mathieu later on Tuesday.
(Reporting by Simon Evans; Editing by Frank Pingue)