The 16-year-old came off the bench to score deep into stoppage time in Monday's Premier League encounter at St. James' Park as the champions snatched a 3-2 victory after 10-man Newcastle had battled back from 2-0 down.
Van Dijk told Sky Sports: "It is a dream debut for him. It was a perfect technique. We stayed calm towards the end as well, tried to find the right solution in order to score a goal, and we did it. I'm very pleased for Rio."
With his late strike, Ngumoha, who turns 17 on Friday, became the fourth-youngest goalscorer in the Premier League, behind James Vaughan, James Milner and Wayne Rooney.
Information from PA and ESPN's Global Sports Research contributed to this report
Newer articles
Older articles
Jofra Archer Returns to England Test Squad After Four-Year Absence
Deepti Sharma Opts Out of The Hundred 2025 Amid Heavy Workload; Knott Named Replacement
Rating the new attacking signings: Sesko, Pedro, Gyökeres, more
Goalkeeper Senne Lammens joins Man United from Antwerp - sources
Jamie Overton takes indefinite break from red-ball cricket
Rahul Regrets Pant's Costly Run-Out Before Lunch, Shifting Momentum in Lord's Test
Kajol's Hilarious Take on Ajay Devgn Look-Alike Meme Goes Viral: 'Singham Will Flip Out!'
Conway Replaces Injured Allen; New Zealand Adds Depth for Tri-Series Tournament
Siraj Hit With Fine, Demerit Point for Duckett Send-Off at Lord's Test
Southee Accuses Gill of Hypocrisy Amid Tensions in Lord's Test Clash