Lukas Rosol of the Czech Republic and Jerzy Janowicz of Poland advanced to the Winston-Salem Open final with three-set victories on Friday.
Top-seeded John Isner has withdrawn from his Winston-Salem Open quarterfinal against Lukas Rosol on Thursday because of a sprained ankle.
American John Isner made short work of his third-round match Wednesday in the Winston-Salem Open, beating Kazakhstan's Mikhail Kukushkin 6-1, 7-6 (7-3).
John Isner admits that he usually has a rough time in his first tournament match.
Defending champion Marcel Granollers of Spain defeated Diego Schwartzman of Argentina 6-3, 6-4 to reach the quarterfinals of the Kitzbuehel Cup on Thursday, while top-seeded Philipp Kohlschreiber of Germany lost.
Lukas Rosol advanced to his fourth quarterfinal of the month by beating Andreas Haider-Maurer of Austria 6-3, 7-6 (4) at the Bet-at-Home Cup on Wednesday.
Top-seeded Fabio Fognini rallied to defeat Borna Coric of Croatia 5-7, 7-6 (4), 6-3 in the quarterfinals of the Croatia Open on Friday.
Defending champion Tommy Robredo beat fellow Spaniard Albert Ramos-Vinolas 6-4, 6-4 on Wednesday to reach the quarterfinals of the Croatia Open.
Fifth-seeded Lukas Rosol of the Czech Republic needed a late rally to beat 100th-ranked Diego Sebastian Schwartzman 6-3, 3-6, 7-6 (2) in the first round of the Croatia Open on Tuesday.
The 17-year-old Alexander Zverev reached the semifinals of his hometown tournament by defeating Tobias Kamke 0-6, 7-5, 6-3 in the Hamburg Open on Friday.
Lukas Rosol upset 2006 champion Tommy Robredo of Spain 7-5, 7-6 (6) on Thursday to reach the quarterfinals of the Hamburg Open.
Serbian qualifier Filip Krajinovic defeated defending champion Fabio Fognini 6-4, 6-0 Wednesday as a host of seeded players crashed out in the second round of the Hamburg Open.
Dominic Thiem fought from 5-2 down in the final set and held off a match point before upsetting the eighth-seeded Marcel Granollers 2-6, 6-3, 7-5 in the second round of the Hamburg Open on Tuesday.
Roberto Bautista Agut defeated Lukas Rosol 6-3, 4-6, 6-2 in the Mercedes Cup final on Sunday for his second career title.
Roberto Bautista Agut and Lukas Rosol reached the final of the Mercedes Cup with victories over the top two seeds in the semifinals on Saturday.