Croatia's Ana Konjuh came through a quarter-final and a semi-final at the Aegon Open to set up a showpiece meeting with Monica Niculescu in Nottingham.
Rain delays have hampered the WTA grass-court tournament this weekend and that again proved the case on Sunday as 17-year-old Konjuh was forced to play both Sachia Vickery and Alison Riske.
Konjuh beat qualifier Vickery 6-2 6-2 before getting past another American in the shape of fifth seed Riske, again in straight sets.
Niculescu - who knocked out top seed Agnieszka Radwanska - will prove Konjuh's final test on Monday.
Having seen off Vickery in straight sets, Konjuh's momentum was curtailed during her semi-final victory over Riske as the weather once again halted play.
Rain stopped proceedings midway through the first set but, when the match eventually resumed, the Croatian kept her nerve to serve out for an advantage.
Riske - whose quarter-final opponent Yanina Wickmayer retired during their second set - dropped serve in the fifth game of the final set with Konjuh saving three break-points in the next game as the writing appeared on the wall.
Another break in the final game saw set up Konjuh set up her third match of the day against Niculescu, who had fought from a set down to send out Radwanska.
The Pole had not dropped a set prior to Sunday's delayed meeting with Niculescu and was on course to make the final when she edged a 59-minute opening set.
Radwanska had accepted a wildcard in the competition after falling at the first hurdle in the French Open but the world number 13 gradually ran out of steam.
While she fought back from 3-1 down to level in the second set, Niculescu took the match to a third, which she claimed with a loss of just 12 points.