Another lightweight bout has been added to the UFC on FOX 16 preliminary card in July as Rustam Khabilov will meet Danny Castillo on the preliminary card. 
The fight booking was confirmed to Fox Sports today by the UFC.
UFC on FOX 16 will come from the United Center in Chicago, Illinois on July 25th and will be headlined a title rematch as T.J. Dillashaw defends the bantamweight title against former champion Renan Barao.
Khabilov (17-3) has dropped back to back fights after starting 3-0 in the UFC. His most recent defeat came in February as he lost a split decision to Adriano Martins at UFC Fight Night 61. Just like Khabilov, Castillo (17-8) has dropped his last two fights and is 1-3 in his last four. He is coming off a knockout defeat against Paul Felder at UFC 182 and it was the first time since 2012 that he was defeated by stoppage.
The current UFC on FOX 16: Dillashaw vs. Barao II fight card is below.
Main Card: (FOX 8 p.m. ET/5 p.m. PT)
T.J. Dillashaw (11-2) vs. Renan Barao (33–2, 1NC)
Anthony Pettis (18-3) vs. Myles Jury (15-1)
Miesha Tate (16-5) vs. Jessica Eye (11-2,1 NC)
Preliminary Card: (TBA)
Ramsey Nijem (9-5) vs. Erik Koch (14-4)
Rustam Khabilov (17-3) vs. Danny Castillo (17-8)