A man who stabbed his ex-girlfriend's new partner to death in a six-second attack in Barnsley before fleeing to London has been jailed for life.
Daniel Miscka, 28, was stabbed by Daniel Balazs, 21, in August 2023.
Sheffield Crown Court heard Mr Miscka, also known as Daniel Varadi, had recently formed a relationship with Balazs' ex-partner.
On Tuesday, Balazs, of Heelis Street, Barnsley, was sentenced to life in prison with a minimum term of 20 years.
He was also sentenced to 12 months in prison for possession of a bladed article, which will run concurrently.
The jury heard previously how Balazs stabbed Mr Miscka in the chest in Newton Street, Barnsley, at around 21:00 BST on 9 August.
He then fled the scene and travelled to London, but handed himself in to police the following day.
David Brooke KC, prosecuting, said the defendant had found out his former girlfriend, with whom he had a young child, had struck up a relationship with Mr Miscka.
The court heard the couple had decided to keep it a secret, as they "knew there would be trouble", he said.
However, when Balazs' former girlfriend eventually broke the news to him, he did not react.
Balazs denied murdering Mr Miscka, a Hungarian native, and claimed he had acted in self-defence.
On Monday, following a six-day trial, the jury found Balazs guilty of murder.
Passing sentence, Judge Graham Reeds KC, told the defendant it appeared Balazs had wanted to "teach him a lesson" when he sought a confrontation with Mr Miscka.
"You snuffed out the life of another man and in the process ruined the lives of the people closest to him, and indeed your own life," Judge Reeds said.
"When his family remembers Daniel and all his qualities, the heartbreak for them is that you took all of that away because of your petty and immature jealousy."
A statement from Mr Micska's brother read out in court described the father-of-two as a talented footballer who was his best friend.
He said: "He was a very friendly person, he was respectful, polite and would never upset anyone, he would always avoid conflict, he didn't like negativity in his life.
"He was a happy soul and a joy to be around. He will be missed terribly."