World Extreme Cagefighting welterweight champion Carlos Condit -- having effectively nuked the UFC sister promotion’s 170-pound division -- got the call to the big show.

Condit (22-4) will make his promotional debut in a main event showdown with Danish striker Martin Kampmann at UFC Fight Night 18 on Wednesday, April 1 at the Sommet Center in Nashville, Tenn. The UFC made the rumored matchup official on Tuesday.

The 24-year-old Condit will carry an eight-fight winning streak, which dates back to a 2006 loss to Pat Healy, into his first UFC appearance. Now based out of the Arizona Combat Sports camp, the New Mexico native last appeared in August when he stopped former middleweight Hiromitsu Miura on fourth-round strikes at WEC 35. Condit, who has never been knocked out, also holds victories against Pride Fighting Championships and UFC veteran Frank Trigg, Carlo Prater, John Alessio and Brock Larson.

Kampmann (14-2), who moved to welterweight after a one-sided loss to middleweight contender Nate Marquardt at UFC 88, made his debut at 170 pounds in January and scored a second-round technical knockout against Alexandre Barros at UFC 93. The former Cage Warriors champion overcame a career-threatening knee injury in 2007 and remains the only man to defeat current UFC middleweight title contender Thales Leites. Based out of Xtreme Couture Mixed Martial Arts in Las Vegas, Kampmann has delivered 12 of his 14 career wins by knockout, technical knockout or submission.

Other bouts rumored but not confirmed for the event include lightweight matches pairing Tyson Griffin with Rafael dos Anjos and “The Ultimate Fighter 8” winner Efrain Escudero with Jeremy Stephens. In addition, American Top Team prospect Cole Miller will likely tackle the controversial Junie Allen Browning.

UFC Fight Night 18
Wednesday, April 1
Sommet Center
Nashville, Tenn.

Carlos Condit vs. Martin Kampmann
Tyson Griffin vs. Rafael dos Anjos
Efrain Escudero vs. Jeremy Stephens
Cole Miller vs. Junie Allen Browning
Ryan Bader vs. Carmelo Marrero
Ricardo Almeida vs. Matt Horwich
Tim McKenzie vs. Aaron Simpson