Sing Tao are seeking legal advice as to what possible action they can take against referee Poon Chi-king for his handling of Sunday's match against South China, which ended in a controversial 1-1 draw at Siu Sai Wan Stadium. Sing Tao officials are upset over Poon's officiating in the First Division match, which saw Sing Tao winger Chan Tsz-kong being sent off for verbal abuse and five minutes of injury time inexplicably added on to the game. South China struck the equaliser in the fifth minute of injury time, courtesy of striker Au Wai-lun, who cancelled out Wai Kwan-lung's 83rd minute goal. Sing Tao assistant team manager Edward Shum Wan-ho said a formal complaint would be sent to the Hong Kong Football Association later this week, although he predicted the HKFA was unlikely to take up the matter. 'We still have to do something about it,' said Shum. 'Maybe the HKFA won't do anything about it, but we must do our part. We have to clear our conscience over this matter because we take it very seriously.' Shum is particularly angry over allegations that Poon had sworn at Chan before sending him off. Chan had apparently asked the referee why he was not stopping play when Sing Tao midfielder Chu Yue-tai was lying injured on the pitch. According to Shum, Poon took offence and swore at Chan, who then retaliated by cursing the referee. 'It is totally unacceptable that a referee should swear at a player. Chan swore back at the referee and was shown the red card,' said Shum. 'We'll been speaking to lawyers [today] to see whether any action can be taken,' he added. Arch-rivals and champions Instant-Dict trail second phase leaders South China by three points from the same number of games - eight. Despite dropping two points, South China are still in a strong position to win the second phase and line up a grand final with Instant-Dict on June 1.