The Hague - Nicolas Mahut defeated fellow veteran Xavier Malisse 6-3, 6-3 on Friday to reach the 's-Hertogenbosch grasscourt final on Friday.
Mahut, now ranked at 240 in the world after a lengthy battle with a knee injury, will take on Swiss second seed Stanislas Wawrinka for the title on Saturday at the Wimbledon warm-up event.
Wawrinka defeated Spain's Guillermo Garcia-Lopez, 6-1, 6-4 in his semi-final.
In the women's final, Belgium's Kirsten Flipkens will face Simona Halep of Romania.
Flipkens defeated Spain's Garbine Muguruza, 6-3, 6-1 while Halep eased past another Spaniard, Carla Suarez Navarro, 6-3, 6-2 in her semi-final.