Back injury crocks Couples again

Back issues have kept the 55-year-old Couples off the senior tour for two months.

Couples, a former world number one, has won 57 professional tournaments, most notably the 1992 Masters Tournament.

He joined the senior tour in 2011 and won his maiden senior major at the Senior Players Championship and followed this up when he won the Senior British Open Championship in July 2012.

Paul Trittler has since replaced Couples ahead of Thursday's first round.