Duterte and De Guzman, at the start of the campaign last month, accused each other of womanizing, and lately, of receiving kickbacks from different projects and programs of the city government.
Duterte alleged that De Guzman pocketed huge kickbacks from the construction of the Artica Sports Dome, among other projects.
De Guzman, on the other hand, accused the congressman of pocketing funds allotted for peace and order projects when he was the city mayor.
Duterte and De Guzman used to be close political allies, with the latter serving as city administrator when the former was mayor from 1988 to 1995. Duterte ran for Congress in 1998 and won, but is seeking to regain City Hall.
Local political observers are still uncertain who will win the mayoral race, saying it is a very close fight.  Edith Regalado