Alireza Jahanbakhsh became the club's record signing when he joined from AZ Alkmaar in July 2018.
Jahanbakhsh began his career with the Damash Gilan youth academy, before moving to Iranian second division side Damash Tehran in 2010.
He returned to Gilan a year later and became one of the club’s youngest-ever players, making his senior debut in 2011 at the age of 17.
The midfielder moved to Holland and signed for NEC Nijmegen in 2013, where he made 64 appearances and scored 19 goals, winning the Dutch Eerste Divisie title in his second and final season at the club.
A move to Alkmaar followed in 2015 and the Iranian was the 2017/18 top scorer in Eredivisie, where he scored 21 goals in 33 appearances.
He also has more than 40 caps for Iran and featured in all three of the country’s games at the 2018 FIFA World Cup in Russia.
Jahanbakhsh made his Albion debut in the 2-0 opening day defeat to Watford in August 2018, and made 24 appearances in all competitions for the Seagulls during his first season at the club.