Siddique, who hails from southern port city of Karachi and works in Abu Dhabi, said he didn't abuse or pass any insulting remarks to the Pakistan team.
"I was just telling Misbah to include Younis Khan in the one-day team," Siddique said outside the stadium. "We didn't shout any insulting remarks or hurled any stones at them."
Khan missed out again when the ODI team was named last weekend, and expressed his surprise on Monday.
Siddique said Misbah could have been frustrated as South Africa took a huge first-innings lead of 418 runs after Pakistan was bowled out for 99 in the first innings.
"Maybe he got frustrated and took out his anger on us," he said.