While the overall domestic box office was hit by the Olympics Closing Ceremonies on Sunday, Universal’s weekend champ “The Bourne Legacy” bore the brunt of that day’s deflated tally, with revised weekend totals at $38.1 million vs. the studio’s originally estimated $40.3 million three-day gross.

U had anticipated that the London 2012 ceremonies would affect “Bourne” — the studio estimated that the pic’s Sunday take would trail Friday by a considerable 18%. But the Olympics event wound up having a much larger impact on the B.O. than projected.

Capping two weeks of strong Olympics viewership, NBC’s primetime coverage of Sunday’s four-hour extravaganza averaged 31 million viewers.

For Warner Bros.’ second-place pic, “The Campaign,” revised weekend figures, at $26.6 million, came in 3% lower than the studio’s $27.4 million estimate. Holdover “The Dark Knight Rises” also lost a little ground, grossing $19 million vs. $19.5 million.

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Sony’s midweek opener “Hope Springs” fell slightly with $14.7 million in three days vs. $15.6 million. Pic’s final five-day figure came in at $19.1 million.

The ceremonies’ effect on the domestic B.O.’s newcomers was considerable, since all three openers were heavily geared toward adult auds. The nation’s heat wave also could have kept some moviegoers from venturing out of their houses this weekend.

The Olympics Closing Ceremonies seemingly had little impact on “Bourne” internationally: The pic wound up earning $7.7 million from just 13 markets, compared to the projected $7.8 million overseas start.