Casper Højer Nielsen (born 20 November 1994) is a Danish professional footballer who plays as a left back for Turkish Süper Lig club Çaykur Rizespor.
A product of FC Copenhagen's youth academy, Højer failed to break through and mainly played at the lower levels for Brønshøj and Lyngby early on.
[10][11] There, Højer Nielsen fought for a regular place and helped secure the club's survival in the Superliga relegation round.
[13] On 9 May 2021, it was announced that Højer Nielsen had signed with Czech First League club Sparta Prague for an undisclosed fee, reported to be €700,000.
[15] On 10 September 2023, Højer Nielsen signed a three-year contract with Turkish club Çaykur Rizespor.