Kevin Na has a slim lead after three rounds of the Charles Schwab Challenge.
The American has a two-shot lead over five players including Tony Finau, Jordan Spieth and Jim Furyk.
The final round gets underway later on Sunday.
Na tees-off alongside Mackenzie Hughes at 10:05 pm UAE time.

US keep Super 8 hopes alive with 31-run win over Namibia in T20 World Cup
Sweden's Ponsiluoma shows nerves of steel to win men's pursuit gold
Holder, Hope help West Indies thump Nepal, make T20 World Cup Super Eight
Banton blitz lifts England past Scotland in T20 World Cup
Tudor appointed as interim Tottenham manager until end of season
