Ousmane Viera

Viera began his senior career with Daloa in 2003. He spent several seasons playing in the Ivorian league, where his performances attracted the attention of European scouts. In January 2008, Viera joined CFR Cluj, a club competing in the Romanian top flight. During his first season, he won the Romanian league title and the Romanian Cup. In 2009, he was loaned to Internațional Curtea de Argeș. After his loan spell, he joined Pandurii Târgu Jiu in 2010. Over the following three seasons, he played an important role in the club's historic qualification for European competitions at the end of the 2012–13 season. In the summer of 2013, Viera joined Çaykur Rizespor, a club competing in the Süper Lig. He spent three seasons with the club. In 2016, he signed for Adanaspor, who had been promoted to the Turkish top flight. He spent one season with the club before they were relegated, after which his contract expired. After his spell in Turkey, Viera returned to Romania in 2018 and joined Sepsi OSK. He helped the club progress before moving to Hermannstadt in 2019. He remained there until 2021, when he retired from professional football after spending much of his career in the Romanian league.

Viera was selected by manager Gérard Gili to represent Ivory Coast at the 2008 Summer Olympics in China. During the Olympic tournament, he played four matches, against Argentina, Serbia, Australia, and Nigeria. Ivory Coast reached the quarter-finals of the competition. He earned his first international cap on 6 September 2013 in a match against Morocco during the sixth and final round of the 2014 FIFA World Cup qualifiers in Brazil. The match ended in a 1–1 draw. He was named in Sabri Lamouchi's 23-man Ivory Coast national team squad for the FIFA World Cup. However, the team disappointed and was eliminated in the group stage despite being drawn in a seemingly manageable group. Viera did not play a single minute during the tournament. Selected by Hervé Renard for the 2015 Africa Cup of Nations, he came on twice first in the group-stage match against Cameroon, and later in the semi-final against DR Congo. At the end of the tournament, he became African champion along with the rest of the team. When Kolo Touré retired from international football, he referred to Viera as the "new Minister of Defence." On 26 March 2015, he scored his first international goal in a friendly against Angola, helping Ivory Coast to a 2–0 victory.

International

Scores and results list Ivory Coast's goal tally first, score column indicates score after each Viera goal.

CFR Cluj

Liga I: 2007–08 Cupa României: 2007–08, 2008–09 Ivory Coast

Africa Cup of Nations: 2015