Oliver Abildgaard Nielsen (born 10 June 1996) is a Danish professional footballer who plays as a defensive midfielder for Serie B club Pisa, on loan from Como.

[2] He was in the starting lineup and was responsible for a penalty that gave Esbjerg the lead, but he also scored the equalizing goal.

[3] On 9 September 2015, he made his Danish Cup debut when he was in the line-up against the local rivals from Vendsyssel FF.

[4] On 3 February 2020, it was confirmed that Abildgaard had joined Russian club FC Rubin Kazan on a loan until 30 June 2020 with an option to buy.

On 31 January 2023, he joined Serie A club Hellas Verona on a loan-deal for the remainder of the season.