World No.17 Casey edged past overnight leaders Bernd Ritthammer and Robert MacIntyre with three birdies on the back nine to finish 14-under for the tournament at the Green Eagle Golf Course.

It was the second victory of the year for the 42-year-old after lifting the trophy at the Valspar Championship on the PGA Tour.

"I get emotional at every victory but this year has been so fantastic.” – Paul Casey

"I get emotional at every victory but this year has been so fantastic," Casey told europeantour.com, who dedicated the trophy to former winner Gordon Brand Jnr following his death at the age of 60 last month.

Scottish rookie MacIntyre, who finished sixth in the Open Championship, continued his impressive run with a closing 68 as he secured a runner-up finish for the third time this season.

The 23-year-old shared second spot with German Ritthammer and Matthias Schwab of Austria.

Victorian Lucas Herbert carded a final-round 69 to finish tied for 22nd place.