LOS ANGELES - Matt Damon has found supremacy at the box office.

Damon's "The Bourne Supremacy," the sequel about the amnesiac assassin he played in "The Bourne Identity," debuted as the top weekend movie with ticket sales of $53.5 million, according to studio estimates Sunday. That was nearly double the opening weekend take of $27.1 million for "Bourne Identity" in summer 2002.

Halle Berry's critically derided comic-book adaptation "Catwoman" opened a distant third with $17.16 million, behind "I, Robot," which took in $22.05 million to lift its 10-day total to $95.4 million.

"The Bourne Supremacy," starring Damon as CIA killing machine Jason Bourne, outdid another super-agent with the same initials. The sequel's opening weekend topped the $47.1 million debut for "Die Another Day," the best premiere ever for the James Bond franchise.

Universal Studios made "The Bourne Supremacy" for about $75 million, a bargain price in a business where many summer thrillers cost $100 million or more to produce.

"Catwoman," which cost a bit less than $100 million to make, was a disappointment for distributor Warner Bros.

"I was hoping it would open up with a few more dollars in the bank," said Dan Fellman, Warner's head of distribution. "But it's a pretty competitive weekend out there. We'll have to see how we hold up during the week."

1. "The Bourne Supremacy," $53.5 million.

2. "I, Robot," $22.05 million.

3. "Catwoman," $17.16 million.

4. "Spider-Man 2," $15 million.

5. "A Cinderella Story," $8.04 million.

6. "Anchorman: The Legend of Ron Burgundy," $7.1 million.

7. "Fahrenheit 9/11," $5 million.

8. "The Notebook," $4.45 million.

9. "King Arthur," $3.06 million.

10. "Shrek 2," $2.4 million.