Mr Walker said the victim had been drinking sitting on a grassy part of the seafront on the evening of the attack. Samu had approached the victim and spent some time sitting with him throughout the course of the evening.
The court heard that Samu then left the victim to go and call a taxi, something he subsequently did twice further.
On every occasion that he called a taxi, Samu said he could not get the victim to move and the taxis left.
At 9.10pm he made an emergency call and asked for the number of a taxi, this was provided to him by an operator. He then called 111 again at 10.20pm to tell police of an assault. Mr Walker said he did not immediately request an ambulance but instead talked about the victim being drunk, angry and violent. He also said the victim had hit him.
The trial has been set down for three days, with the jury expected to retire on Wednesday.