The 16-year-old winger could prove crucial in the Champions League last 16 second-leg clash with Napoli on Tuesday at the club's temporary Olympic Stadium home. Yamal became the youngest player ever to feature in the Champions League knock-out stages as he impressed in the 1-1 first-leg draw in the south of Italy. Robert Lewandowski opened the scoring but Barcelona were pegged back by Victor Osimhen, leaving the tie finely poised.