Roger Federer enters the 2012 U.S. Open as the tournament's top seed, knocking last year's champion and 1-seed Novak Djokovic down to the 2 spot. Olympic gold medalist Andy Murray rounds out the top three. The top-seeded American, John Isner, comes in at No. 9, while fellow countryman Andy Roddick is No. 20. Who are the best bets to win the final Grand Slam of the tennis season? Click the photos below to set your rankings!

U.S. Open men's contenders

Nicolas Almagro

Nicolas Almagro

ATP ranking: 12
U.S. Open seed: 11

Tomas Berdych

Tomas Berdych

ATP ranking: 7
U.S. Open seed: 6

Marin Cilic

Marin Cilic

ATP ranking: 13
U.S. Open seed: 12

Juan Martin Del Potro

Juan Martin Del Potro

ATP ranking: 8
U.S. Open seed: 7

Novak Djokovic

Novak Djokovic

ATP ranking: 2
U.S. Open seed: 2

Alexandr Dolgopolov

Alexandr Dolgopolov

ATP ranking: 15
U.S. Open seed: 14

Roger Federer

Roger Federer

ATP ranking: 1
U.S. Open seed: 1

David Ferrer

David Ferrer

ATP ranking: 5
U.S. Open seed: 4

Richard Gasquet

Richard Gasquet

ATP ranking: 14
U.S. Open seed: 13

John Isner

John Isner

ATP ranking: 10
U.S. Open seed: 9

Philipp Kohlschreiber

Philipp Kohlschreiber

ATP ranking: 20
U.S. Open seed: 19

Juan Monaco

Juan Monaco

ATP ranking: 11
U.S. Open seed: 10

Andy Murray

Andy Murray

ATP ranking: 4
U.S. Open seed: 3

Kei Nishikori

Kei Nishikori

ATP ranking: 18
U.S. Open seed: 17

Milos Raonic

Milos Raonic

ATP ranking: 16
U.S. Open seed: 15

Andy Roddick

Andy Roddick

ATP ranking: 21
U.S. Open seed: 20

Gilles Simon

Gilles Simon

ATP ranking: 17
U.S. Open seed: 16

Janko Tipsarevic

Janko Tipsarevic

ATP ranking: 9
U.S. Open seed: 8

Jo-Wilfried Tsonga

Jo-Wilfried Tsonga

ATP ranking: 6
U.S. Open seed: 5

Stanislas Wawrinka

Stanislas Wawrinka

ATP ranking: 19
U.S. Open seed: 18

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