Guilherme Viana losses
Over 13 years as a professional, Guilherme Viana has compiled a 9-4 (9) record, including two title fights across two weight classes. He has four losses, one of them in a title fight.
4. Guilherme Viana loses to Rasul Magomedov via unanimous decision
On August 21, 2025 Guilherme Viana faced Rasul Magomedov in a light heavyweight bout. Viana was 39 years old with a record of 9-3, and Magomedov was 0 with a record of 0-0. Viana was on a 2-fight winning streak. Viana lost via unanimous decision. Went the distance with Magomedov.
3. Guilherme Viana loses to Philipe Lins via KO
On July 23, 2016 Guilherme Viana faced Philipe Lins in a light heavyweight bout. Viana was 30 years old with a record of 7-2, and Lins was 30 with a record of 9-1. Viana was coming off a win, while Lins was coming off a loss. Lins stopped Viana via TKO in the 2nd round.
2. Guilherme Viana loses to Francis Carmont via unanimous decision
On March 27, 2015 Guilherme Viana faced Francis Carmont in a light heavyweight bout. Viana was 28 years old with a record of 6-1, and Carmont was 33 with a record of 22-10. Viana was on a 3-fight winning streak, while Carmont was on a 3-fight losing streak. Viana lost via unanimous decision. Went the distance with Carmont.
1. Guilherme Viana loses to Rodney Wallace via split decision
On December 7, 2012 Guilherme Viana fought Rodney Wallace for the vacant IFC light heavyweight title. Viana was 26 years old with a record of 3-0, and Wallace was 31 with a record of 14-6. Viana was on an undefeated 3-fight winning streak, while Wallace was coming off a loss. Viana lost via split decision. Failed to win the vacant title. Went the distance with Wallace.