The Iranian team will face bank of Beirut on Wednesday having lost its impressive unbeaten record stretching back to last year's campaign.
Mes Sungun lost to Nagoya Oceans of Japan in its final group match on Monday.
“We are feeling a bit of pressure because we lost a good player (Saeid Taghizadeh) through injury during the match against Al Dhafra of the UAE,” Taghipour said.
“Our other concern is that in our last match against Nagoya Oceans, we were in good goal scoring positions but lost the match and because of that our confidence has taken a dip.”
Taghipour, however, is confident captain Farhad Fakhim and his men will see off Bank of Beirut's challenge and take their place in the semi-finals.
“All the teams in the final eight have an equal chance of qualifying for the next round. Bank of Beirut is a good side but we are staying focused in our approach and are working towards progressing further in this tournament,” he said.