Thomas 'couldn't stop thinking'

Justin Thomas admitted to becoming consumed with thoughts of taking over the world No 1 ranking before losing his semifinal at the WGC-Dell Match Play on Sunday.

Thomas would have overtaken fellow American Dustin Johnson to become top dog in the rankings for the first time had he made the final at Austin Country Club in Texas. Instead, he lost 3-and-2 to Bubba Watson and remained at No 2.

It was a case of lesson learned, Thomas said.