German second seed Tommy Haas outlasted Croatia's Ivan Dodig 7-6 (8/6), 2-6, 6-1 on Friday to reach the semi-finals of the $455,775 ATP Delray Beach International Championships.
Haas, 34, is a former World No. 2 now ranked 19th who is seeking his 14th career title in the Florida hardcourt event, the final US tuneup for next week's start of the ATP Masters Series tournament at Indian Wells, California.
Haas will next face Latvian qualifier Ernests Gulbis, who defeated Spanish qualifier Daniel Munoz 6-1, 6-4 in 75 minutes.
US top seed John Isner meets South African sixth seed Kevin Anderson and Lithuanian lucky loser Ricardas Berankis faces France's Edouard Roger-Vasselin in the other quarter-finals.