Agony and ecstasy, despair and redemption; football's cycle is eternal. Five years ago, Pedro Mantorras was, briefly, the golden boy of Portuguese football, but he has started just one game for Benfica in the past three seasons.

If the Angola forward comes off the bench against Liverpool in the Champions' League tomorrow though, he is assured of a rapturous welcome at the Estadio da Luz.

Once he was explosively fast and possessed of a ferocious shot. When he was hailed as "the new Eusebio", it wasn't simply because he came from Portuguese-speaking Africa.

Then in February 2002, after just 23 games for Benfica, he suffered damage to a knee ligament. He has hardly been off the operating table since.

"It was very hard," he said, "especially at the beginning. Now the important thing is to get rhythm again. I haven't had much opportunity until now, but I expect shortly to be playing 90 minutes."

Whether the 23-year-old will ever recover the pace of old, though, is a significant doubt.

Such was his impact in that brief purple patch that he remains an immensely popular figure among the Benfica support, the fact that his form had disintegrated by the time he succumbed to injury all but ignored.

"I haven't lost the support of Benfica fans," he said. "I am here and people haven't forgotten the name of Mantorras. When I warm up they all cheer me. They like to say I have the African magic."

His popularity is at least in part down to his demeanour. For some, football is a profession, for others, it is a passion, for him it has been a salvation. Traumatic as a knee injury may be to a professional athlete, it is nothing to what he has been through, growing up amid Angola's civil war.

"My father was killed when I was three months old and my mother died when I was 16," he said.

"I became head of the family very young. I lived with my sisters and my brothers. Like any poor family, we had a lot of problems."

It was when he was 16 that he was spotted by a scout from Barcelona. Jose Mourinho, assistant to Louis van Gaal at the Nou Camp at the time, spoke of Mantorras being described as "a teenaged George Weah" only to disappoint when he arrived for a trial.

"It was a real culture shock for him," Mourinho told the Portuguese website MaisFutebol. "One day he was in Luanda and the next he was on a set with what must have seemed like Hollywood stars. I took him to a sports store belonging to a brand where he had a contract and found him the right kind of kit for the Catalan winter. I remember this little-boy-lost expression."