Shane Toon-Poynton drove to the woman’s home on Clinton Street on March 6 after pub staff refused to serve him, prosecutor Annelli Pritchard said.
“He walked in very drunk, slurring his words and kept saying, ‘I’m sorry,'” she said.
His ex-partner asked his sister to try sobering him up and Toon-Poynton left, leaving his work bag and medicine behind.
But he returned at 11.30pm, headed for the fireplace and ripped the LED lights off the fireplace before throwing framed photographs across the room.
“He grabbed her by the hair and pulled her to the ground like a rag doll,” Ms Pritchard said. His victim shouted: “Leave me alone”.
His half-brother dragged him away and he left. He came back kicking and banging on the door. The police arrested him soon after.
The woman had been in a relationship with the accused for nine years, which ended in November last year.
In a statement, she said she was shocked by the attack as he had never behaved like this before.
The court heard he had only one previous drink-driving conviction since 2016.
Toon-Poynton, 28, of Garside Street, pleaded guilty to assault by beating, using violence to secure entry and criminal damage, at the earliest opportunity, when he appeared at Nottingham Magistrates Court on Wednesday .
District Judge Leo Pyle ordered a probation report and released him on bail to appear in Mansfield Magistrates Court on August 9 to be sentenced, on the condition that he not contact his victim.
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