Abdul Quddus, of Rother View Road, Canklow pleaded guilty to one count of wounding with intent relating to the assault at an earlier hearing.
Relaying the evidence during the sentencing hearing at Sheffield Crown Court today, Judge Roger Thomas QC told the court that the incident arose out of an altercation Quddus, 38, had with his former partner.
Judge Thomas said: "That part of the case has faded away but what's left is you coming to blows with this man that you knew.
"You came to fisticuffs, and you landed this heavy blow on him that caused him some injuries."
Remembering 'beautiful' and 'amazing' Blake and Tristan Barrass three years on from tragic Sheffield brothers' funeral
Sheffield Council employees sacked as fraud increases including theft and excessive internet use during work
EuroMillions: Mystery winner from South Yorkshire has won £79,242.50 on The National Lottery
Power cut Sheffield: Hundreds of homes in Hillfoot area without power ahead of 28C heatwave today
Sheffield Council tenant forced to pay £5,000 and struck from housing register for fraud
Quddus' victim lost a tooth in the altercation, the court was told.
Judge Thomas sentenced Quddus to 80-hours of unpaid work, and granted restraining order which prevents him from contacting his former partner for the next three years.