Nottingham Forest had previously attempted to sign Engels in February, but their £25 million bid was rejected. Crystal Palace also had interest in the 22-year-old Belgian international, who has produced 15 goal involvements in all competitions for Celtic as they won the domestic double. Brendan Rodgers has previously hailed Engels as "outstanding", highlighting his potential as a valuable addition to any team.

Engels has four caps for Belgium and has shown impressive form for Celtic, making him an attractive option for Nottingham Forest as they look to the future.