Early career

Born in Frederiksberg, Capital Region of Denmark, Westergaard began playing football as a youth for Frederiksberg Boldklub in 2004.^[3] In 2011, he moved to the FC Copenhagen School of Excellence where he stayed for three years before joining Lyngby Boldklub at U17 level.^[3]

Westergaard graduated through the Lyngby academy,^[4] before making his first-team debut as a starter in a 3–0 Danish Superliga defeat to OB on 22 April 2018.^[4][5]

First team

He was permanently promoted to the first team in the summer of 2018 after the club had suffered relegation to the Danish second tier.^[6] Westergaard signed a one-and-a-half-year contract extension with Lyngby on 4 January 2019.^[6] Six months later, after Lyngby had reached promotion to the Superliga after one season, he signed another contract extension, keeping him at the club until the summer of 2022.^[7][8]

Loan to Hvidovre

On 1 October 2020, Westergaard joined Danish 1st Division club Hvidovre IF on a loan deal for the rest of 2020.^[9] On 4 October, he made his debut for the club in a 2–1 away win over Vendsyssel.^[10] Later that month, he scored his first goal in a 1–5 home loss to Silkeborg.^[11]

In December 2020, Westergaard extended his loan deal by a further six months.^[12] In his season with Hvidovre, Westergaard scored 5 goals in 25 total appearances,^[2] including one in the Danish Cup round of 16 against Vejle Boldklub, which saw his club knocked out after a 2–3 loss.^[13]

Return to Lyngby

Westergaard returned to Lyngby after his loan deal with Hvidovre expired. In the meantime, Lyngby had suffered relegation to the second-tier.^[14] Westergaard immediately appeared in the starting lineup upon his return, in a 2–1 away win over Nykøbing.^[15] He was a starter during the 2021–22 campaign, in which Lyngby managed to win promotion back to the Superliga.^[16] Westergaard finished the season with 27 total appearances in which he scored four goals.^[2]