Celestine Babayaro became the first Nigerian to play for Chelsea when he joined the London club in April 1997, aged 18, for £2.25 million, a club record paid for a teenager at the time.
He played over 200 games for Chelsea, winning the UEFA Cup Winners' Cup, UEFA Super Cup, FA Cup and FA Charity Shield.
However, he struggled for game time when Mourinho took charge of the club in 2004, as the Portuguese manager preferred to play Wayne Bridge in that position.
Babayaro left Chelsea for Newcastle in January 2005.
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