Great Britain's Kyle Edmund advanced to the quarter-finals of the BB&T Atlanta Open by coming from a set down to beat Peter Gojowczyk.
Edmund lost the the first set but he recovered to come out on top with a 2-6 6-4 7-5 victory despite a rain break in Georgia.
The 22-year-old will play Jack Sock or Dudi Sela in the last eight after the victory over the German.
Aljaz Bedene bowed out of the German Tennis Championships in Hamburg after losing in three hard-fought sets to Russia's Karen Khachanov.
British number three Bedene battled back to square the match after losing a first-set tie-break, but was edged out in the decider to lose his second-round match 7-6 (7/4) 5-7 6-4 against the world number 32.
Khachanov will now play Federico Delbonis in the quarter-finals after the Argentinian qualifier upset Spanish veteran and eighth seed David Ferrer 7-5 6-3.
Argentina has two other players in the quarter-finals in Hamburg. Nicolas Kicker was a surprise 6-4 7-6 (9/7) winner against French fifth seed Benoit Paire and Diego Schwartzman hit back to beat German qualifier Cedrik-Marcel Stebe 1-6 6-4 6-2.
Kicker will play Philipp Kohlschreiber after the latter beat fourth seed Gilles Simon 6-3 3-6 6-2, while sixth seed Schwartzman faces another German, Florian Mayer, who edged out Russia's Andrey Kuznetsov 6-3 4-6 6-4.
Czech Republic's Jiri Vesely is also through to the last eight after beating Argentina's Horacio Zeballos 6-4 6-4.
Defending champion Feliciano Lopez was knocked out of the Swiss Open in Gstaad by world number 170 Yannick Hanfmann.
Hanfmann, playing in only his seventh tour-level match, upset third seed Lopez with a 7-6 (7/5) 3-6 6-1 victory in one hour and 49 minutes.
Next up for the 25-year-old German is a last-eight clash against Portugal's Joao Sousa, who swept past Switzerland's Henri Laaksonen 6-1 6-2.
Top seed David Goffin recovered from a set down to finally see off Romania's Radu Albot 2-6 7-6 (9/7) 7-6 (9/7) to set up a quarter-final tie against Dutchman Robin Haase, who came through 7-5 7-5 against Brazil's Thiago Monteiro.
Spanish second seed Roberto Bautista Agut faces Uzbekistan's Denis Istomin in the last eight.
Bautista Agut won 6-4 6-3 against French qualifier Gleb Sakharov, while Istomin beat Germany's Dustin Brown 6-3 6-1.
Italy's Fabio Fognini will face Ernests Gulbis in the quarter-finals on Friday after recovering to beat Slovakian Norbert Gombos 1-6 6-4 6-4.
Gulbis, a former world number 10 who is rediscovering some consistent form after slipping to 310th in the rankings, ousted fifth seed Paolo Lorenzi 7-6 (10/8) 3-6 6-4.
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