Johan Daniel Mårtensson (born 16 February 1989) is a Swedish former professional footballer who played as a midfielder.

During his career at GAIS, he first came from the third-tier club Skövde AIK and, therefore, had some time to adapt to compete at a higher level.

Mårtensson progressed and had shortly became a key player at GAIS's midfield.

On 9 July 2011, both GAIS and FC Utrecht confirmed that Mårtensson had signed a four-year contract with the Dutch side.

[1] Mårtensson was included in the Sweden squad for their friendly against Ivory Coast on 15 January 2015, scoring on his debut.