Sundby Boldklub was one of 109 clubs from Denmark that had teams playing during Kronborg Cup 2023. They participated with two teams in Boys 2009 A and Girls 2008 A 11v11 respectively. The team in Girls 2008 A 11v11 made it to the the Bronze match in Playoff Aand won it over Kronoby by 4-3.

In addition to this, Sundby Boldklub have participated in Kronborg Cup before. During Kronborg Cup 2022, Sundby Boldklub had 5 teams playing in Boys 2012 A, Boys 2012 B, Boys 2011 C, Boys 2009 A 11v11 and Boys 2008 A respectively. Three teams played until Bronze match in Playoff A; Boys 2012 A lost against Lyngby Boldklub 1921 by 4-5, Boys 2012 B lost against Nivå-Kokkedal FK by 1-3 and Boys 2008 A lost against B93 by 0-1.

Sundby Boldklub comes from København S which lies approximately 42 km from Helsingør, where Kronborg Cup takes place. The area around København S does also provide 95 additional clubs participating during Kronborg Cup 2023 (Among others: Ålholm IF, Vestegnens bold akademi, Jyllinge FC, Borstahusens BK, Boldklubben 1908, FIF, Hillerød, BK Vestia, Herlev IF, Kastrup Boldklub and Havdrup GI).