The incident happened last Tuesday after a match between a top ranked New Zealand player and a promising Australian at the International Tennis Federation Event.
It is understood the player accused of the assault put his shoulder into the other player following a heated match.
The father of the alleged victim called the police and told them his son had been assaulted.
Police went to Wilding Park and spoke to the players involved.
A police spokesperson said it was unlikely any further action would be taken.
The player alleged to have made the assault was withdrawn from the tournament.
It is understood he has the right to appeal any further sanctions handed out to him.
Tournament director and ITF official Tony Glentworth did not want to comment on the incident due to it currently being under investigation by the ITF.
Tennis Canterbury chief executive Ryan Forbes was also unable to comment on the incident due to the tournament falling under ITF jurisdiction.
