The tenth episode of The Ultimate Fighter 21 debuted last night on Fox Sports 1 and featured American Top Team’s Nathan Coy defeating Valdir Araujo of the Blackzilians by unanimous decision. 
According to Nielson sources, the preliminary viewership for the show came in at 450,000 viewers and this is the third most viewed episode of the season.
After ten episodes, the average viewership in the preliminary ratings for The Ultimate Fighter 21 is 386,000 viewers and the average viewership of the show in the +3 DVR ratings is 560,000 viewers.
The ratings history of The Ultimate Fighter 21 is below.
Episode 1: Live+SD – 490k, +3 DVR – 704k
Episode 2: Live+SD – 454k, +3 DVR – 646k
Episode 3: Live+SD – 364k, +3 DVR – 524k
Episode 4: Live+SD – 286k, +3 DVR – 415k
Episode 5: Live+SD – 340k, +3 DVR – 512k
Episode 6: Live+SD – 353k, +3 DVR – 586k
Episode 7: Live+SD – 371k, +3 DVR – 625k
Episode 8: Live+SD – 425k, +3 DVR – 566k
Episode 9: Live+SD – 332k, +3 DVR – 467k
Episode 10: Live+SD – 450k, +3 DVR – Available next week