A Hawthorn professional tennis coach who seriously injured a woman in an altercation after he drove the wrong direction up a one-way street has been fined $1000.

Evan Polites, 39, was also ordered to do 250 hours of unpaid community work, but avoided a conviction on a charge of recklessly causing serious injury.

Melbourne Magistrates Court heard on Tuesday, the 52-year-old woman sustained three fractures to a wrist when she tried to break her fall after Polites "forcibly" pushed her in a St Kilda street.

The court was told that Polites did not intend to cause her any injury but felt, "I was just protecting my personal space as I felt threatened I guess".

Leading Senior Constable Jacqueline Steiger said as Polites drove his BMW sedan the wrong way up Charles Street at 1.30pm on October 4 last year, the woman tried to signal his error before he momentarily stopped alongside her.

Leading Senior Constable Steiger said a "brief heated argument" ensued between them before Polites continued to drive, but as he did she "tapped" the side of his car in frustration.

Polites stopped his car, approached her on foot and "forcibly pushed" her with both hands to her shoulders which caused her to fall backwards, she said.

The woman, who had some items in her left arm, tried to break her fall by extending her other arm but she landed heavily on that hand.

Polites remained at the scene to render her assistance before she was taken to hospital by ambulance where the injury was diagnosed.

Defence lawyer George Defteros said a conviction for Polites, who pleaded guilty, could have an "enormous impact on his future".

Mr Defteros told magistrate John Doherty that his client was not only a professional tennis coach but director of a company, which imported clothes from overseas.

Polites regularly went to Europe and mostly America and a conviction for violence could cause serious travel restrictions, he said.

Mr Defteros asked the court to take into account Polites' guilty plea, his remorse, which included a letter of apology, character references from a "cross section of the community", his assistance to the victim and the impact of a conviction on his "social and economic wellbeing".

Mr Doherty put Polites on a 12-month community corrections order with a condition he do 250 hours of unpaid work and also fined him $1000.