Career
Simonsson made his Association of Tennis Professionals main draw doubles debut at the 2012 Swedish Open. Simonsson made the quarterfinals of the 2015 Swedish Open partnering Jonathan Mridha.
Simonsson made his Association of Tennis Professionals main draw doubles debut at the 2012 Swedish Open. Simonsson made the quarterfinals of the 2015 Swedish Open partnering Jonathan Mridha.
Simonsson has a career high Association of Tennis Professionals singles ranking of 655, achieved on 12 October 2015. He also has a career high Association of Tennis Professionals doubles ranking of 540 achieved on 5 October 2015. In march 2016 Simonsson won the Association of Tennis Professionals Challenger Tour doubles tournament Remote Control Hotel Open partnering Isak Arvidsson.