Dustin Johnson the defending champion
This weekend on the European Tour the action switches to the Saudi Arabia Invitational which was played for the first time last year.
Open champion Shane Lowry is in the field and will start his first round tomorrow morning at 25 to 10 Irish time.
Graeme McDowell will start his round at a quarter past 9.
There is a star studded field which includes World number 1 Koepka, Sergio Garcia and last years' winner and world number 3 and winner last year Dustin Johnson who says he is very happy to be back to defend his title: