Rory McIlroy and Jordan Spieth, the top-two players in the world, picked up easy wins on Wednesday at the WGC- Cadillac Match Play Championship.
McIlroy carded just one birdie, but it was more than enough to beat Jason Dufner, 5 & 4, at TPC Harding Park. Spieth posted seven birdies in 16 holes as he took down Mikko Ilonen, 4 & 2.
Henrik Stenson, Justin Rose and defending champion Jason Day were the highest ranked players to lose on day one. John Senden birdied the 18th hole to square his match with Stenson, then birdied the first extra hole to win 1-up in 19 holes.
Marc Leishman won two of the first three holes against Rose and led throughout. The Australian downed Rose, 3 & 2. Day and Charley Hoffman were tight through 11 holes with one win apiece to go with nine halves. Hoffman birdied three of four holes from the 12th en route to a 4 & 3 win.
The event changed formats this year, with 16 groups of four players playing a round-robin format the first three days, as opposed to the old setup of four groups of 16 in a single-elimination format. The winners of each group will advance to Saturday's round of 16.