Career
AIK Bengtsson started his senior career at AIK, where he made his debut in August 2006, against Östers IF at Råsunda Stadium. Football Club Nordsjælland After three and a half seasons at AIK, Bengtsson searched for more playtime and joined on 10 September 2009 the Danish Superliga Football Club Nordsjælland. Bengtsson began his Nordsjælland spell as back-up for Dennis Cagara, receiving his debut in the Danish Cup against Bachelor of Arts on 23 September 2009.
His first Superliga match was a 6-3 defeat against Brøndby IF on 4 October 2009.
From 1 November 2009, Bengtsson became a regular starter for Football Club Nordsjælland on the left back position. Through his performances, Bengtsson became in the interest of Union of European Football Associations Champions League competitors F.C. Copenhagen in the summer 2010, and in the following winter transfer window, Bengtsson moved to Copenhagen.
Football Club Copenhagen In Copenhagen, Bengtsson was a back-up for Oscar Wendt in his first half year. Nevertheless, received Bengtsson playtime in 8 of 16 matches before Wendt moved on to join Borussia Mönchengladbach.
Bengtsson"s debut came as a substitute on 22 February 2011 in the Union of European Football Associations Champions League round-of-16-match against Chelsea F.C. In the 2011-2012 season, Bengtsson began as first choice on the left back position.
Through the autumn, he was, however, overtaken by Bryan Oviedo, and from 27 October to 15 April Bengtsson was only in the lineup twice. Oviedo was sold to Everton F.C. on 31 August 2012, and since Bengtsson has been the preferred left back in the club Mainz 05 On 23 November 2014, Mainz 05 announced that they had signed Bengtsson effective 1 January 2015.
Since his contract with Football Club Copenhagen had expired 31 December 2014, he was available on a free transfer and signed a contract for three and a half years until summer 2018.
Bengtsson were a part of the Swedish youth national teams, gaining 29 matches totally. He was a part of the Swedish squad at the 2009 Union of European Football Associations Under-21 Championship.
On 19 January 2011, Bengtsson made his debut for the senior national team in a friendly against Botswana.