Mickelson signs up for Singapore challenge

SINGAPORE (Reuters) - World number two Phil Mickelson has signed up for November's lucrative Singapore Open, organizers said on Tuesday.

The American is joined as an early entrant at the Sentosa Golf Club event by South African Ernie Els, Australian Adam Scott and South Korea's Choi Kyung-ju.

The Asian Tour tournament will boast prize money of $5 million, an increase of $1 million on last year's pot, sponsor Barclays said.

Mickelson competed in last year's event which marked his first appearance on the Asian Tour. The 2007 Singapore Open was won by Argentine Angel Cabrera, then U.S. Open champion, who held off Fiji's Vijay Singh for a one-shot victory.

(Editing by Ed Osmond)