Blades boss Nigel Clough enjoyed his night out in the capital on Monday as he witnessed United set up an FA Youth Cup last 16 clash with Everton at Bramall Lane.
Clough, who attended the fourth round tie against Millwall at the New Den alongside Andy Garner and Gary Crosby, was delighted to see Travis Binnion's youngsters progress after another thrilling penalty shootout success.
The Gaffer remarked: "There has now been three great away victories in the FA Youth Cup, which mirrors the first-team's progress in the FA Cup.
"The win at Millwall was also the third victory on penalties this season, which shows the young lads can hold their nerve when it counts.
"There were 20 penalties taken on Monday night, with only the goalkeepers left, so the pressure was certainly on both teams.
"I particularly enjoyed the second-half; the lads showed great character to bounce back from 2-0 and everyone associated with the Academy deserves an immense amount of credit."
The Gaffer added: "Another bonus for us was that we got to see Diego (De Girolamo) in competitive action, which made the trip to London all the more worthwhile."