But more important than that, Duval has drawn new strength from claiming his place among those with a major to their name.
"I have greater confidence because of what happened at Lytham," he said. "It opened doors for me, I can come into events like this knowing I can win under various conditions and knowing I can win playing at different levels of my ability."
Woods is well aware that his close friend is likely to pose a greater threat in the last of the season's four majors.
The world No1 said: "David is going to be a little more confident in major championships because he now knows what it takes to win - what kind of mental frame of mind you need to have for the entire week, what kind of game it takes."
Woods comes to the Atlanta Athletic Club's 7,213 yards par 70 championship course having hardly touched a club since finishing 25th at Lytham - his worst finish in a major for nearly four years.
There was a time not so long ago when Woods would go into a major as outright favourite. Here, he admits he is only "one of them".
Sunday's winner takes home the huge Wanamaker Trophy. Duval probably has the beer already on order.