He beat Guy Bakutu Batangule (ZAI) 17:4, Mohamed Homrani (TUN) 17:11 and in the final local hero Newfel Ouatah (ALG) 17:8.
In Beijing he was upset in his first bout 5:7 by Algerian Newfel Ouatah.
Ouatah's the cousin of French football player Karim Benzema, Newfel's and Karim's families are from the same town in Algeria (Ath Djellil).
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In 2007 he lost to M'Bumba, went up a division and started fighting for Algeria where he immediately won a silver medal at the All Africa games losing to Ahmed Samir Abdelhalim 8:17.
Alfonso beat Newfel Ouatah but lost to Russian Evgeny Romanov at the world junior championships 2004 (semifinal).