Robert Rock of England and Matteo Manassero of Italy must capture the Hassan II Trophy in Morocco this week in order to qualify for the Masters next month.
Rock and Manassero are the only golfers competing on the King of Morocco's exclusive Royal Course in Agadir from Thursday who can qualify for the Masters at Augusta National.
Rock lies 57th in the world rankings and Manassero 61st, and either must win to be inside the top-50 and the assurance of direct acceptance in the year's opening major.
''Augusta and qualifying for the Masters is the reason why I played in Spain last week and I'm here this week in Morocco,'' Rock said.
''The only way I can now really get into the Masters is to win this week, and given how well I played in the Andalucia Open I'm quietly confident of doing enough to get myself inside the top-50.
''I have left it a bit late to try and get myself into the Masters but I'm sure I will be well inside the top-50 by the time the U.S. Open comes around (in June)....