A man attacked a fellow drinker shortly after they both watched Anthony Joshua retain his world heavyweight title.
Dodou Saidy stabbed Baker Kiweewa after a fight between the two on September 22, 2018, escalated.
Saidy went to the nearby house where he was staying, picked up a kitchen knife and came back and stabbed Mr Kiweewa.
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Saidy denied being behind the stab attack but was found guilty by a jury.
At his sentencing hearing on Friday, Alaric Walmsley, prosecuting, said a fight started between the pair shortly after the end of the fight between Joshua and Alexander Povetkin.
Jurors in his trial had previously heard that both Saidy and Mr Kiweewa were at the Africa 9JA Bar on Prescot Road to watch the fight.
However, after it finished a scuffle ensued between the men, apparently following a misunderstanding between Mr Kiweewa and a woman who was with Saidy.
CCTV showed the scuffle spilling out on the road before it dissipated and Saidy, who at this point was topless, left.
However, the 45-year-old went to a nearby house where he was staying and grabbed a kitchen knife before returning to the bar and stabbing Mr Kiweewa multiple times.
Mr Kiweewa was left with stab wounds to the base of his neck and the rear of his shoulder as well as lacerations on his hands.
He spent three days in hospital before being discharged.
Saidy was arrested shortly after the attack and interviewed the following day but only admitted to having a fight with Mr Kiweewa.
Even during the trial, he said he was not the man who came to the scene a few minutes later to carry out the stab attack.
However, forensic analysis saw Mr Kiweewa’s blood recovered on a ring Saidy was wearing when he was arrested.
He was found guilty unanimously after brief deliberations.
Olajide Lanlehin, defending, said yesterday that Saidy now accepted full responsibility for the attack despite denying it during his trial.
He said: “The defendant has told me that, contrary to what is stated in the pre sentence report, he takes full responsibility for what took place that night and that he does express full remorse.”
Mr Lanlehin said Saidy accepted he had issues with alcohol and managing his temper and he was taking steps in prison to address both.
The judge, Recorder David Knifton, QC, judged Saidy to be a dangerous criminal and said alcohol was a key factor in him carrying out the attack.
Referring to Saidy’s other convictions for assaulting emergency workers and carrying knives, Recorder Knifton said: “You have a propensity to aggressive behaviour when in drink.
“I am told that since being in custody you have taken steps to address your behaviour.”
Saidy, of Bristol Road, Southsea, was sentenced to seven years in prison and will face a further four years on extended licence when released.
Merseyside Police told the ECHO they had no mugshot of Saidy.
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