Cristiano Ronaldo became the first player to score at six World Cups when he broke the deadlock early on against Uzbekistan.
He scored his second of the game shortly before the half-time interval, now trailing Lionel Messi by three goals in the Golden Boot race.
What happened in the match?
Portugal thrashed Uzbekistan 5-0 in Houston, with Nuno Mendes, Rafael Leao, and an own goal completing the rout.
Cristiano Ronaldo's goals came at the age of 41 years, 138 days, making him the second-oldest scorer in World Cup history.
Why it matters for Cristiano Ronaldo
Ronaldo has scored 10 goals at the World Cup, making him Portugal's leading World Cup scorer ahead of Eusebio on nine.
He made his 24th World Cup appearance, with only Lionel Messi and Lothar Matthäus having made more.
What comes next for Portugal?
Portugal bounced back from their 1-1 draw with DR Congo, with their win over Uzbekistan giving them a boost in the tournament.
Uzbekistan's hopes of advancing to the round of 32 are slim, with a nine per cent chance according to forecast tools.
Cristiano Ronaldo's performance was ruthless, with him involved in more attacking sequences than anyone else on the pitch.
The match saw a significant age gap between the starting players, with 22 years and 183 days between Cristiano Ronaldo and Bekhruz Karimov.
The World Cup has seen a high number of goals, with 139 scored in 45 games, the most ever in the group stages of a single tournament.
Cristiano Ronaldo's record-breaking performance has cemented his place in World Cup history, with him becoming the oldest European player to score a goal in a major tournament.