Table tennis coach Luo Jie was not paid for the weekly training sessions he conducted in Fuhua Secondary for two years.
When he left Fuhua in 2003, he was told by the school that they had treated his services as "voluntary", although he claimed he was owed over $10,000 in pay, the court heard on Tuesday at the trial of two former-table tennis officials who are accused of embezzlement.
Mr Luo first began coaching at the school in March 2001.
He told the court he had witnessed a verbal agreement between his predecessor and Ms Doreen Chan - the teacher-in-charge for table tennis - when he was first introduced as the new coach earlier that year.
At the time, it was also said he would be paid $40 an hour.
Former Singapore Table Tennis Association officials Choo Wee Khiang, 58, and Koh Li Ping, 44 - are accused of embezzling $8,400, purportedly fees meant for Mr Luo who was moonlighting at Fuhua.
Their trial continues in the aftrernoon