He spent the first three months in the reserves, and made his league debut as a substitute in a 3-1 win over Wimbledon 28 March 1992 at Selhurst Park.
However, he was unable to oust first-team regulars Lee Dixon and Nigel Winterburn, and played only 16 games in all competitions during his time at the club.
[2][3][4] In February 1994, Lydersen went on loan to his old club IK Start for the 1994 Tippeligaen season and the move was made permanent when his contract was terminated by Arsenal in March 1995.
On 21 February 1995 Arsenals manager George Graham, had lost his job after a Premier League inquiry found he had accepted an illegal £425,000 payment from Norwegian agent Rune Hauge following Arsenal’s recruiting of Lydersen and John Jensen, two of Hauge’s clients.
[5] Lydersen went on to play for Sturm Graz in Austria and then onto Molde, before retiring at the end of the 1999 Tippeligaen season.