Juventus won the match 2-0 after Porto had Alex Telles sent off after 27 minutes, meaning the visitors enjoted the majority of possession and opportunities.
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Buffon had a largely comfortable game, but still helped his clean sheet record - which now stands at six in the last seven games.
The 167-time Italy international is known for clean sheets throughout his career, holding the records for most minutes without conceding in Serie A, most matches in a row without conceding, most clean sheets in a season, and most clean sheets of all time.
For Italy, he also shares the record of most clean sheets at a World Cup finals, and also has saved the most penalties of any Italian international.
