The 64-year-old attacker, a martial arts expert, delivered the life-changing blow to his 21-year-old victim after a petty feud spilled over into violence.
A court in the province of Ourense, northwestern Spain, heard how the two men were known to each other and had had a previous disagreement over the defendant walking his dogs without a lead.
The defendant had also complained that the victim drove too fast in his van.
At about midday on July 26, 2015, the victim saw the defendant and his dogs in San Esteban de Vilamoure Road, in Punxín, and tried to avoid him by hiding in his van, La Voz de Galicia reported.
But the defendant struck the man’s van with a plastic racket, and he got out to confront the dog walker over his behaviour.
The defendant responded by kicking the victim hard in the genitals, rupturing the testicular sac.
The man spent three days in hospital and had to undergo surgery to have his left testicle removed. He was signed off work for another 12 days as he recovered from his injuries.
Prosecutors emphasized the defendant’s continued flouting of Spanish laws which state all dogs must be kep on a lead while out in public.
They also claimed the man’s fighting skills meant that he knew where and how to injure a person.
But the court ruled the attack showed “no evidence of the influence” of martial arts and that such a strong kick can be given by any person.
The man was sentenced to three years in prison and ordered to pay €47,000 (£40,400) to his victim, as well as £2,500 in medical expenses.
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