Another coach and friend, Julian Arnold, said Mr Arber was among the top few hundred players in Australia, and ran tennis tours for young players to New Zealand the US. "He's a great guy, there's nothing bad to say about him," he told the Herald Sun. "It's pretty devastating news."
Mr Arber's parents have arrived in New Zealand as the search for their son continues.
Hamilton police yesterday had a caravan in Hamilton East with a mannequin wearing clothes similar to the tracksuit Mr Arber was wearing when last seen.
Mr Arber's wallet and keys were found on Cook St while his luggage and passport were left in his accommodation.
Detective Inspector Karl Thornton said yesterday that the coach had been seen to stop and pat the dog of a couple who were out walking their pet just before he disappeared.
He had also stopped to speak to a man described by witnesses to be a homeless person who police believed he gave some money to.
Police appealed for the couple and the man to come forward.
"We are becoming increasingly concerned that we have not heard from Mr Arber. He is not familiar with the area and does not know anyone in Hamilton," Mr Thornton said.
Mr Arber is described as a slightly built Caucasian, 179 centimetres tall (5 foot 9 inches) with short, dark hair.
He was wearing a grey tracksuit with a tennis logo on the left breast of the top and a Wilson tennis logo on the left shoulder of the top.
Any information which may help in locating him can be provided to Hamilton police station on 07 858 6200 or anonymously through Crimestoppers on 0800 555111.
