Rio de Janeiro, Brazil (SportsNetwork.com) - Former French Open runner-up David Ferrer was a hard-fought quarterfinal winner on a sweltering Friday at the $1.55 million Rio Open tennis tournament.

The second-seeded world No. 9 Spaniard held off former top-10 Argentine Juan Monaco 6-3, 4-6, 6-2 in just over two hours at Rio's Jockey Club Brasileiro.

This week's clay court champion will pocket $343,000.