The right-back is only 19 but with a release clause of £17.4m, United are ready to pounce - according to reports in both Portugal and England.
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He played 46 minutes the following game but still came up big with 46 points to send the series to a seventh and deciding game. The way the Rockets can respond to this is by sticking with their normal offense, finding the mismatch and exploiting it.
A naturally right-footed player, Dalot has shown his versatility by also playing on the left side throughout his Porto career.
Not many fans will have heard of the 19-year-old, he only broke into the Porto first team in February.
An announcement is due within the next few days as manager Jose Mourinho steps up his efforts to strengthen United's defence this summer as he attempts to close the gap with Manchester City after a trophyless campaign.
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It's also a race where it's extremely hard to overtake, which Vettel was reminded of as he trailed Ricciardo for half the race. It was yet another mistake from the Kiwi in what is becoming a run of missed opportunities for the Le Mans victor .
José Diogo Dalot Teixeira, known as Dalot was in October voted as Porto's Young Player of the Year and is rated as one of the best young talents in world football.
Dalot is primarily a right-back but can also play at left-back, another problem area for Mourinho.
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Information for this article was contributed by Jennifer Sinco Kelleher, Audrey McAvoy and Sophia Yan of The Associated Press. Meanwhile, about 60,000 gallons of pentane, a highly-flammable chemical, were moved from the PGV site early this month.
However, the Portuguese is now closing on a move to Manchester United and according to Portuguese daily O Jogo, his representatives have communicated his decision to Porto.