When Tottenham thrashed Manchester City 4-0 at the Etihad back in November, neither Archie Gray nor Lucas Bergvall had ever been named in the XI for a Premier League fixture, while Djed Spence was still waiting for his first Spurs start more than two years after joining the club.
Neither Porro nor Udogie have ever faced serious competition for their place under Postecoglou but if the Europa League Final was tomorrow and all three full-backs were fully fit, Spence would have a compelling case to start ahead of one of them.
At just 19, Bergvall is establishing himself as a key player for Spurs and feels hard to drop after another eye-catching display against Ipswich at the weekend, while Rodrigo Bentancur, who was suspended back in November, has seemingly moved ahead of Bissouma as Postecoglou's senior midfield option.
Spence's ability to play both sides means Postecoglou can rotate between them, and it will likely be Porro and Spence against City because Udogie made his first appearance in more than six weeks in the win over Ipswich on Saturday.
It was Spence's first appearance in more than two months and it would be another three weeks before he was handed his long-awaited first Spurs start at Southampton in mid-December.