While Ronaldo Vieira has undoubtedly put in a number of impressive performances since he burst into Leeds' first-team, there is arguably one display that stands out more than any other.
In January of this year, Vieira was simply sensational in the Whites' narrow win over Derby that would be talked about as a benchmark for the rest of the campaign.
His display led to then-Rams boss Steve McClaren heaping praise upon the teenager (via Yorkshire Evening Post), and arguably made it clear to anyone who had not been following Leeds closely until that point that the Yorkshire club had a very special talent on their hands.
After a frustrating start to this season, Vieira's display at Bristol City earlier this month threatened to be as impressive as the Derby display, but his most recent performance was much more underwhelming.
The 19-year-old struggled, as many of his teammates did, to cope with Sheffield United on Friday, as Thomas Christiansen's side fell to a narrow defeat on a night where they looked second-best for much of the contest.
So perhaps Vieira will have a smile on his face when he sees that the next game for Leeds sees Derby travel to Elland Road on Tuesday night.
Though much has changed for the two clubs, the fixture has to evoke memories of that brilliant win back at the start of the year where Vieira looked inspired.
And if it does manage to help Vieira play at that level once again, it may not be too great a surprise if Leeds improve significantly and pick up just their third win in their last eight league games.