Luis Suarez hit an 85th-minute winner to give La Celeste their first win of the campaign and send them level on points with Group D rivals Italy and Costa Rica, who have a game in hand with each other today.
Speaking to FIFA.com at full time, Tabarez said that his pre-match preparations were pointless as the clash in Sao Paulo was determined by Uruguay's "persistence" to win a war of attrition.
"We won because they were fighting. It was not to do with the training, but the persistence and will of my players.
"Maybe we don't play very attractive football but we have players who give everything on the field."