| UAAP Season 66 | |||||||||
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| Olympism: Blending Sports with Culture and Education | |||||||||
| Host school | Ateneo de Manila University | ||||||||
| Overall | |||||||||
| Seniors |  University of Santo Tomas | ||||||||
| Juniors | University of Santo Tomas | ||||||||
| Seniors' champions | |||||||||
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| Juniors' champions | |||||||||
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| (NT) = No tournament; (DS) = Demonstration Sport; (Ex) = Exhibition; | |||||||||
UAAP Season 66 is the 2003−04 athletic year of the University Athletic Association of the Philippines, which was hosted by the Ateneo de Manila University. The season opened on July 12, 2003