Atlético Rafaela Born in
Rafaela, Werner was an
Atlético Rafaela youth graduate. On 10 August 2015 he made his professional debut, starting in a 5–1 routing of
Deportivo Merlo, for
the year's
Copa Argentina. Werner made his
Primera División debut on 3 October 2015, starting in a 1–1 away draw against
Arsenal. In March 2016 he was chosen as a first-choice, as starter
Germán Montoya was injured; the latter subsequently moved to
Belgrano.
Atlético Madrid and loans On 20 August 2016, Werner signed a five-year contract with
La Liga club
Atlético Madrid, being immediately loaned to
Boca Juniors for one season. He returned to
Atleti ahead of the
2017–18 season, being third-choice behind
Jan Oblak and
Miguel Ángel Moyà. On 8 March 2018, after Moyà was released, Werner made his competitive debut for Atlético by starting in a 3–0
UEFA Europa League home defeat of
FC Lokomotiv Moscow. On 29 April of the following year, he made his
La Liga debut by playing the full 90 minutes in a 1–0 win at
Deportivo Alavés. On 11 July 2018, Werner joined newly promoted
La Liga club
SD Huesca on one-year loan. A third-choice behind
Roberto Santamaría and
Aleksandar Jovanović, he only featured in eight league matches overall during
the campaign, as his side suffered relegation On 21 June 2019, Werner once again went on loan, this time to
Atlético San Luis in Mexico. After spending his first season as a backup to
Carlos Felipe Rodríguez, he became the first-choice option in 2020–21 season, after his loan was extended for a further year.
Elche On 1 September 2021,
free agent Werner returned to Spain and its top tier, after signing a two-year contract with
Elche CF. After being a third-choice behind
Édgar Badía and
Kiko Casilla, he was loaned to
Arsenal de Sarandí back in his home country the following 31 January. On 30 January 2022, Werner was loaned out to Argentine club
Arsenal de Sarandí until the end of 2022. On 15 August 2023, after spending the entire
2022–23 as a backup to Badía as the club suffered relegation, he moved to
Rosario Central on a one-year loan, with a buyout clause. ==International career==