Friday's ATP round-up
World Indoor Tournament
Ferrero could be out for two to six weeks
Top seed Juan Carlos Ferrero's tournament ended in agony after he was forced to retire hurt during his quarter-final against local favourite Raemon Sluiter.
The Spaniard had a break point for a 3-1 lead in the first set when he twisted his right ankle after chasing a Sluiter forehand.
Ferrero fell to the ground in pain clutching his ankle, remaining flat on his back until ATP trainer Juan Reque ran to his side.
Close to tears and with his ankle heavily strapped, a devastated Ferrero added: "This is so difficult to accept.
"I was playing so well this week but life in tennis is like this. I just turned my ankle and that was the end."
Tournament doctor Babette Pluim said the injury normally
takes between two to six weeks to heal.
Defending champion Nicolas Escude joined Ferrero in hobbling out of the tournament with a hamstring injury.
Escude, who was bidding to become the first man to win a hat-trick of titles here, quit after half way through his match with Sebastien Grosjean.
Grosjean advanced with the score at 5-7 7-6 4-4.
Earlier, Roger Federer progressed to the semi-finals after an easy 6-2 6-4 win over Sjeng Schalken.
The way I'm playing right now, my confidence is at an
all-time high - I want to keep this streak going
The fifth seed was in dazzling form as he stepped up his bid for a second consecutive title.
Schalken was out for revenge after Federer beat him in the Davis Cup just two weeks ago.
But the Dutchman was out of his depth for much of the match and could not suppress a rampant Federer.
He was joined in the last four by doubles partner Max Mirnyi, who beat Russia's Yevgeny Kafelnikov 7-6 7-6.
Buenos Aires Open
Number eight seed Guillermo Coria upset Wimbledon finalist David Nalbandian to reach the semi-finals.
The Argentine came from a set down to beat his compatriot 3-6 6-3 7-6, winning the deciding tie-break 7-5.
Coria will face fourth-seed and compatriot Gaston Gaudio, who beat Jose Ignacio Chela 6-3 6-4.
Former world number one Gustavo Kuerten of Brazil became the first non-Argentine into the last four when he beat Spain's Felix Mantilla 6-2 6-7 6-1
Kuerten will meet top seed Carlos Moya in the second semi-final after the Spaniard beat Luis Horna of Peru 6-7 (4-7) 6-3 7-5.
St Jude Classic
Top seed and defending champion Andy Roddick will face compatriot Brian Vahaly in the last four after coming from a set down to beat Robby Ginepri 5-7 6-4 7-6.
The event will feature the first all-American semi-finals in an ATP Tour event for eight years, with Taylor Dent to face Vincent Spadea.
Spadea beat Mardy Fish 6-2 4-6 6-3 to continue his best run this year. He has never won a title and has played in only two finals, none since 1999.
Vahaly reached his first ATP semi-final by defeating Georgia's Irakli Labadze 6-3 4-6 6-4, while Dent dispatched Vladimir Voltchkov of Belarus 7-6 6-2.