Nembhard was stabbed in Ladbroke Grove, under the Westway flyover on Monday.
The rapper’s manager Chris Patrick said in a statement: “He went to Carnival with his younger sister and friends to have a good time.
“This is the worst possible ending for a talented kid.”
On Instagram, he wrote: “2 years ago a young 19 Year old man came from Bristol to meet me at my Studio with his dad, his name was Takayo Nembhard AKA TKorStretch.
Nembhard was stabbed to death on Monday
Twitter/Chris Patrick
“That meeting took us on a journey… we recorded some great music together. His talent was endless and I can tell you guys he was close to greatness!
“So it’s with a heavy heart that I bring the news that Takayo (TKorStretch) passed away last night
“He came from Bristol to simply have a good time at the London carnival and this is the end result!
“My deepest condolences to TK’s Mother & Father his Brother, 2 Sisters, Girlfriend and child that will never meet his father!
“TK was a good kid, a good guy and what has happened breaks my heart…
“Rest in peace my Friend.”
Police patrol during the Notting Hill Carnival in London
Victoria Jones
Young and old descended on the streets of London at the weekend as the Notting Hill Carnival turned the area into a party for the first time since the pandemic.
But despite the euphoria and wild celebrations, the Carnival descended into chaos at times.
Mayor of London Sadiq Khan said: “I am sickened by this awful attack.
“Violence has no place on our streets and we are doing everything in our power to root it out.
“I urge anyone with information to contact the police on 101 or anonymously by @CrimeStoppersUK. There is no honour in staying silent.”
Police said “a number of violent incidents and serious stabbings” prompted a section 60 order to be put in place until 1am on Tuesday within the event’s borders.
A section 60 order was put in place by police until 1am on Tuesday
Victoria Jones
Dr Alison Heydari, Commander of Local Policing, said: “The atmosphere over the past two days has been largely positive and good natured as carnival should be.
“Regrettably, on Monday evening we saw a number of violent incidents and a 21-year-old man has lost his life.
“Our thoughts are with his family as they come to terms with their terrible loss.
“A murder investigation is under way, led by homicide detectives from the Met’s Specialist Crime Command.
“They will pursue every possible line of inquiry to identify those responsible and bring them to justice.
“There were hundreds of people in the immediate vicinity when this incident took place.
“I would urge anyone who saw anything, who has video footage or who has any other information that could assist officers, to come forward.”