According to Ariel Helwani & MMAfighting. com :
A welterweight fight is about to be added to UFC 163.
Demian Maia vs. Josh Koschech is slated to take place on the Aug. 3 card, MMAFighting.com confirmed with sources close to the fight after Brazilian Web site News MMA first reported it earlier this week. The UFC has yet to officially announced the 170-pound fight.