Career
Holla played on loan to Football Club Zwolle during the first half of the 2007-2008 season, but returned to parent club Football Club Groningen to replace Rasmus Lindgren, who had moved to Ajax. During the second half of the 2011-2012 season, he was sent on loan again. This time to VVV-Venlo, where he successfully played his matches.
In June 2012, Holla signed with ADO Den Haag before transferring to English club Brighton & Hove Albion during August 2014.
He scored his first goal for the club against Brentford F.C, curling in a superb effort past the keeper, despite his side losing 3-2 at the end of the game.