Willian Klaus (born 11 January 1994), commonly known as Klaus, is a Brazilian professional footballer who plays as a centre-back for Belgian Pro League club RWDM.
Club career
Born in Dois Irmãos, Rio Grande do Sul, Klaus represented Grêmio, Internacional and Juventude as a youth. He made his senior debut with the latter on 12 March 2015, starting in a 0–1 Campeonato Gaúcho away loss against União Frederiquense.
Klaus became a regular starter during the 2016 campaign, as his side achieved promotion from the Série C and reached the quarterfinals of the Copa do Brasil. His first senior goal came on 21 April of that year, the second in a 2–0 home win against former club Grêmio.
On 19 January 2017, Klaus joined Internacional, recently relegated to Série B.