Aged 18 years and 52 days, Ngumoha became the third-youngest player to provide multiple assists in a Champions League game behind Warren Zaire-Emery and Theo Walcott.
Speaking to Amazon Prime, Liverpool midfielder Mac Allister praised the youngster's match-winning impact: "Rio was amazing tonight, he made the difference. He was really important and I'm glad for him. The quality he has is clear, everyone knows. He worked really hard off the ball."
Manager Andoni Iraola echoed that admiration, telling Amazon Prime: "I'm really happy with Rio. He's trying to improve everything that we try to correct. He is playing a lot more on the right and he has adapted well. He's becoming a more complete player. He's still only 18."