Justin Rose admits it would be an "unbelievable" achievement if he can hold on to win gold at the Olympic Golf tournament on Sunday.
Rose, 36, leads the Olympic Golf tournament by one shot over Sweden's Open champion Henrik Stenson heading into the final round.
"It would mean an awful lost to win, especially when you see what it means to other athletes here," said Rose, who fired a 6-under 65 to move into the lead with 18 holes remaining.
"It would be unbelievable. The top three have really separated themselves from the rest of the pack so it is going to be a fun last group."
Stenson struck a 68 to move to 11-under, while Australia's long-time leader Marcus Fraser carded a 72 to lie three shots back on 9-under.
Elsewhere, South Africa's Jaco Van Zyl sank Olympic golf's second hole-in-one at the par-3 eighth hole.