MIAMI, April 1, 2008 (AFP) - Results here on Tuesday from the seventh day of a 7.54 million-dollar ATP and WTA hardcourt tournament (x denotes seed):

Rafael Nadal (Spain x2) bt Paul-Henri Mathieu (France) 6-4, 6-4

James Blake (USA x9) bt Radek Stepanek (Czech) 6-3, 6-4

Igor Andreev (Russia) bt Guillermo Canas (Argentina x15) 6-4, 7-6 (8/6)

Tomas Berdych (Czech x10) bt Dmitry Tursunov (Russia) 6-2, 6-2

Roger Federer (SUI x1) bt Jose Acasuso (Argentina) 7-6 (7/5), 6-2

Serena Williams (USA x8) bt Justine Henin (BEL x1) 6-2, 6-0