The 25-year-old centre-back joins Palace from Lyon after a competing in the Euro 2020 semi-final this summer.
Andersen’s career began in his native Denmark, but he broke into professional football with Dutch side, F.C. Twente. Shortly after making his first-team debut, Andersen was named Under-19 Talent of the Year by the Danish Football Association.
The centre-back joined Serie A side Sampdoria after 50 games with Twente and played regularly under manager Marco Giampaolo. Andersen’s performances earned him a move to Lyon as a record transfer in summer 2019, and he went on to feature in the 19/20 Champions League – including as a substitute in the semi-final against Bayern Munich.
Andersen then tasted Premier League football with a season-long loan to Fulham in October 2020. He captained the Cottagers and was even nominated for Premier League Player of the Month in February 2021.