 Diaz faced Gray Maynard on January 11, 2010, in the main event at "UFC Fight Night 20", a rematch from when the two met in the semi-finals of the "TUF 5" lightweight tournament, which Diaz won.Diaz lost a controversial split decision to Maynard, as the former TUF winner was given the nod in the FightMetric reports, winning rounds two and three.After three losses in four fights, Nate considered making a permanent move up in weight to the 170 lb.