Bradley Dredge and Padraig Harrington look set for an intriguing leadership tussle in the final round at St Andrews

Ernie Els tees off on the second and is part of a pack of players keeping the pressure on Dredge and Harrington

Harrington lines up a putt on the first hole as he continues to challenge Dredge, overlooked by playing partner JP McManus

England's Anthony Wall also keeps the front runners in his sights, just three shots off the lead

Paul Casey trots down the fifth fairway in sprightly fashion despite his Order of Merit chances coming under threat

Ian Poulter carries out some running repairs to a novelty club cover as the action at the top of the table hots up

Harrington eases past Dredge and into the lead at 15 under with some steady play on the front nine

Harrington keeps his game firing nicely on the back nine, while Dredge runs into trouble and drops shots on the 11th

A birdied 18th seals victory by five shots for Harrington and puts the Irishman hot on Casey's heels for the Order of Merit

Harrington celebrates his second win at the event, while Dredge shares second place with Wall and Edward Loar