Lukaku joined Chelsea from Anderlecht as a teenager in 2011 but failed to score a single goal in 15 appearances across three years.
He moved to Everton for £28m in 2014 following an impressive loan spell at West Bromwich Albion.
After a successful stint at Goodison Park, scoring 86 goals in 164 games, Lukaku almost returned to Chelsea in 2017.
However, he opted for a £75m move to Manchester United, where he scored 42 goals in 96 games before joining Inter two years later.
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