European number one Lee Westwood is set to sever ties with long time coach Pete Cowen after slumping to 46th place in the order of merit.
Westwood sacked his caddy three weeks ago and began working with Scot Bob Torrance at this week's Alfred Dunhill Championship.
Westwood began competing on the European Tour in 1994 with Cowen by his side.
The English-born coach has been with him throughout his professional career, during which time Westwood has clinched 26 titles on five different continents.
But he missed six cuts in 17 European tournaments prior to this week's event and a slip to 21st on the world rankings prompted Westwood to rethink his strategy.
He approached Torrance, who also coaches Dubliner Padraig Harrington, last week before the start of the Alfred Dunhill Links Championship in Scotland.
"I consulted Pete and he said for me to seek a second opinion as this has gone on for too long," said Westwood after missing the cut in the inaugural event with a five-over-par total.
"Bob has said the same things about my game but in a different way. Certain ideas have a shelf life and maybe Pete needs to find a different way to put his ideas into effect.
"Unfortunately, this wet weather is not ideal conditions to work fully on changes to your game but there already seems to be a little more light at the end of the tunnel."
Darren Clarke turned his back on Cowen early last season to begin working with Butch Harmon, coach to world number one Tiger Woods.