Nicolai Geertsen

Geertsen signed with amateur club BK Søllerød-Vedbæk after moving from Brøndby IF's U19-team in August 2010. Before coming to Brøndby, he had risen through the ranks of the Lyngby Boldklub academy. Prior to signing with Søllerød-Vedbæk, he had trialled in friendly matches during the summer, where he had left a good impression.[3]

In August 2013, after three years at Søllerød-Vedbæk, Geertsen signed a six-month contract with HB Køge.[4] He made his official debut for the club on 27 August as a starter in a 3–1 Danish Cup away win over Ledøje-Smørum, with Geertsen scoring the second goal for HB Køge.[5] Geertsen was benched during the first four league matches of the regular season, but finally made his Danish second tier debut on 9 September as a 86th-minute substitute for Thobias Ndungu Skovgaard in a 1–2 loss to Hobro IK.[6] He made a total of eight appearances during his first sixth months at HB Køge, and signed a six-month contract extension.[7][8] During the spring season of 2014, Geertsen made nine league appearances.[2] His contract was not extended after its expiration.[9]

On 11 July 2014, Norwegian third tier club Egersunds IK announced that they had signed a contract with Geertsen after a successful trial.[9][10][11] After his contract with the club expired a few months later, he had a trial with FC Helsingør,[12] without this amounting to a contract offer. Instead, Geertsen continued his career in Norway, signing with Sandnes Ulf in January 2015, a club which had recently been relegated from the Eliteserien and therefore competed in the second division.[13] He made his official debut in the second round of the 2015 second division season, starting in a 1–1 away draw against Ranheim IL.[13] In the summer of 2015, Geertsen signed a two-and-a-half year contract extension, keeping him a part of Sandnes Ulf until December 2017.[13] During his time for the club, he became a regular starter and eventually also club captain.[14]

As his contract expired in December 2017, Geertsen declined a contract extension with Sandnes Ulf, citing a desire to return to Denmark.[14] He made a total of 79 appearances scoring four goals during his three years at the club.[2]

A free agent, Geertsen received a number of offers from clubs in Denmark and Norway, including Bodø/Glimt and Tromsø, but he also had a trial at Nykøbing FC, who he ended up not signing with due to its long distance to Copenhagen.[14] In March 2018, he signed with Danish third tier club Hillerød,[15] making his first start only days after joining, in a 2–2 away draw against VSK Aarhus.[15]

Geertsen signed a contract with Lyngby Boldklub from the Danish 1st Division in July 2018 after having trained with their first team, marking a return to the club from his youth.[16] He made his debut in the first round of competition on 29 July, starting in the centre of defense in a 1–1 home draw against Hvidovre IF.[17] Geertsen reached promotion to the Danish Superliga during his first season at the club, in which he made 16 total appearances scoring three goals.[2] During Martin Ørnskov's absence due to a concussion, Geertsen has emerged as club captain.[18]

On 12 November 2020, Geertsen scored a scissor kick where his first attempt clanged off the crossbar and bounced right back to Geertsen, who struck the ball with a second scissor kick, this one squeezing between the goalkeeper’s outstretched arms and a defender standing on the goal line. [19]

On 22 January 2021, Geertsen signed a 1,5-year deal with Danish 1st Division club FC Helsingør.[20]