Ivo Ricardo Abreu Vieira (born 10 January 1976) is a Portuguese former footballer who played as a defender, currently manager of Liga Portugal 2 club Marítimo.

His first game in the competition took place on 22 September 2002, as he came on a last-minute substitute in a 2–0 away win against S.C. Beira-Mar; in the latter season, he contributed 19 appearances to help his team to a best-ever fourth position.

In early March 2015, after Leonel Pontes' resignation, he was appointed his successor at the helm of the first team,[5] leading the club to the final of the Taça da Liga the following month later after disposing of FC Porto in the last-four stage.

[14] He left at the end of this contract, having taken the team from Moreira de Cónegos to a best-ever sixth place,[15] and in June 2019 he was hired by neighbours Vitória SC.

[20] His team were in contention for a UEFA Europa Conference League place on the final day of the season,[21] eventually missing out but finishing 9th.

[25] On 8 December 2022, Vieira replaced his compatriot António Oliveira at the helm of Campeonato Brasileiro Série A side Cuiabá Esporte Clube.

[26] He won the Campeonato Mato-Grossense in his first year – his first career trophy – via an unbeaten season that concluded with a 3–0 aggregate win over União Esporte Clube.