Hélder Wander Sousa de Azevedo e Costa (born 12 January 1994) is an Angolan professional footballer who plays as a winger for Premier League club Leeds United and the Angola national team.
Formed at Benfica, with which he made a single Taça da Liga appearance, Costa spent most of his career abroad, including at Deportivo de La Coruña in La Liga and Monaco in Ligue 1. He also spent several years in England with Wolverhampton Wanderers and currently Leeds United, winning the EFL Championship with both. Costa has represented Portugal from under-16 all the way through to the senior side.
On 11 August 2012, Costa made his professional debut with Benfica B in a 2012–13 Segunda Liga match against Braga B where he played 72 minutes as a winger.
On 19 January 2015, Costa was loaned to La Liga’s Deportivo de La Coruña until the end of the season. He made six appearances for the Galicians, all from the substitutes’ bench.
On 10 July 2015, Costa joined Ligue 1 club Monaco on a one-year loan. He was signed alongside Benfica teammates Ivan Cavaleiro and Bernardo Silva. Costa scored his first goal in a Ligue 1 match on 8 November, opening an eventual 3–1 loss away to Bordeaux. He also provided the assist for Kylian Mbappé’s first-ever league goal for Monaco in a 3–1 victory against Troyes on 26 February 2016, Mbappé becoming Monaco’s youngest-ever league scorer in the process.
On 29 July 2016, Costa moved on a season-long loan to EFL Championship club Wolverhampton Wanderers, for which he made his debut on 6 August as a substitute in a 2–2 draw at Rotherham United. He scored his first goal for the club in a 2–1 EFL Cup win against Cambridge United on 23 August.
On 3 July 2019, Costa joined Championship club Leeds United on loan for the 2019–20 season. As part of the deal, Costa was to join Leeds outright in July 2020 on a four-year contract for an approximate £15 million transfer fee. He was given the number 17 shirt, making him the first player since 2014 to wear it, after the shirt was brought out of retirement. He made his debut on 4 August in Leeds’ Championship opening day 3–1 victory against Bristol City. He made his first start on 13 August in the EFL Cup against Salford City, contributing two assists.