Viktor Gorridsen Fischer (born 9 June 1994) is a Danish former professional footballer who played as an attacking midfielder or winger for clubs such as Ajax and Copenhagen as well as for the Denmark national team.

He then decided in 2004 to move to AGF and then later FC Midtjylland in his native Denmark, Fischer joined the youth of AFC Ajax, where he played for the A1 selection in his first year with the Amsterdam side, having signed a three-year contract, binding him to the club until 30 June 2014.

[8] Ajax would eventually lose the final to Inter Milan 5–3 on penalties, when the match ended 1–1 after extra time, finishing the tournament as runners-up.

[9] Fischer also finished as joint top scorer of the competition with 7 goals, together with Cameroonian youth International Jean Marie Dongou from FC Barcelona.

He was substituted in the 61st minute for Ryan Babel, with the match ending 3–0 for the Amsterdam side, in what would be the club's 50th all time victory over Feyenoord at home in Eredivisie history.

[19] On 5 May 2013, Fischer contributed a goal in the 68th minute to a 5–0 victory at home against Willem II, which secured the top position in the Eredivisie table, and thus the club's third consecutive national title and 32nd overall.

Later that same day, Fischer was announced as AFC Ajax Talent of the Year for his outstanding debut season, during which he emerged as Frank de Boer's first choice on the left wing and which saw him find the back of the net ten times, scoring twelve goals in all competitions all together.

[22] Fischer played the full match on the left wing, as Ajax defeated AZ 3–2 after extra time, earning the 8th overall Dutch Super Cup trophy for the club.

[27] He made his return playing in the Eerste Divisie for the reserves team Jong Ajax, debuting on 21 March 2015 in a 3–0 away loss to De Graafschap.

[32] Fischer made his unofficial debut for the club in a 2–0 away victory over Doncaster Rovers on 16 July 2016, as part of the side's pre-season friendly matches.

[35] After a poor run of results, the club dropped into relegation zone on 4 March 2017, following a 2–0 away defeat to Stoke City,[36] which subsequently lead to Karanka being dismissed later that month.

[43] On 31 January 2018, Fischer returned to his home nation, after leaving Ajax eighteen months earlier, signing for defending champions Copenhagen.

He signed a four-and-a-half-year contract, after an undisclosed transfer fee, reported to be in the region of €2.7 million, was agreed between Copenhagen and Fischer's previous side Mainz 05.