From Brian Keogh in Miami

Padraig Harrington closed with brilliant birdie to finish the WGC CA Championship on a high in Miami.

The Dubliner fired a six iron to seven feet at the dreaded 18th and holed the putt for a round of 71 that left him tied for 20th on one under.

While Tiger Woods looked certain to romp to his 13th WGC title from 24 starts when he took a six shot lead into the last eight holes, Harrington was pleased with his game with just two weeks to go before the Masters.

As he headed for this week's Shell Houston Open, Harrington knows exactly what he has to do to get ready for Augusta after a closing round that featured three birdies and two bogeys.

Harrington said: "One under is not a bad total and picking up six or seven shot over the four days wouldn't have been a problem, at all.

"I didn't putt well this week and I need to work on that because I have been putting well so far this season.

"I need to work on my mental game as well but swing wise I am happy and I know I can hit all the shots you need at Augusta.

"It is all about being in the right frame of mind and it is not something you get on the range - it is something you pick up on the golf course."

Woods birdied the ninth and 10th to get to 13 under par and lead by six shots from Ryder Cup team-mate Brett Wetterich with Aussie Robert Allenby posting a five under par 67 to lead in the clubhouse on six under par.