Born in
Banská Bystrica, Chrien made his professional debut for the local club
Dukla Banská Bystrica against
Košice on 1 December. 2012. On 14 May 2014, he signed a four-year contract with Czech club
Viktoria Plzeň, joining the senior team at the start of the
2014–15 Czech First League. On 29 June 2017, Chrien moved to Portugal and signed a five-year contract with defending champions
Benfica Lisbon. The same year on 20 August, he made his
2017–18 Primeira Liga debut against
Belenenses in a 5–0 victory, coming on in the 71st minute of the match. Due to lack of enough playing time, Chrien was linked with a loan move to Croatian clubs
Hajduk Split and
Osijek. Chrien spent the 2018–19 season with
Santa Clara, who returned to the top division after 15 years of absence. In January 2020, Chrien signed with
Mezőkövesd as a free agent, following low play in Benfica in 2020. ==International career==