Mats Nilsson has four losses against four opponents on his MMA record. For a list of Nilsson's best fights, refer to "Best fights of Mats Nilsson".
On January 3, 2015 Mats Nilsson faced off against Omari Akhmedov in a welterweight bout at age 31. He was coming in with a record of 11-4-1 (7), and Akhmedov was 27 years old and with a record of 13-2 (11). Nilsson lost the fight via 3-round unanimous decision.
On March 8, 2014 Mats Nilsson faced off against Luke Barnatt in a middleweight bout at age 30. He was coming in with a record of 11-3-1 (7), and Barnatt was 25 years old and with a record of 7-0 (5). Nilsson lost the fight via 1st-round TKO.
On May 6, 2012 Mats Nilsson faced off against Tor Troéng in a middleweight bout at age 28. He was coming in with a record of 9-2-1 (6), and Troéng was 29 years old and with a record of 14-4-1 (11). Nilsson lost the fight via 3-round unanimous decision.
On September 18, 2010 Mats Nilsson faced off against Timo Suhonen in a middleweight bout at age 26. He was coming in with a record of 4-1-1 (2). Nilsson lost the fight via 3-round unanimous decision.