World number one Roger Federer is not resting on his laurels as he seeks to win the US Open for a sixth time.
The Swiss ace ended his two-and-a-half-year grand slam wait with victory over Andy Murray in the Wimbledon final, whom he then lost to in the Olympics final.
Federer's Wimbledon success took the 31-year-old back to number one in the world, a position he had last held in June 2010.
He last won the US Open back in 2008 and lost last year at the semi-final stage to Novak Djokovic after he had led by two sets to love and held two match points in the decider only for his opponent to produce a lasso of a forehand return that turned the match on its head.
But he beat Djokovic to win the Cincinnati Masters last weekend and he is confident - but not complacent - heading into Monday's first round clash with America's Donald Young at Flushing Meadows.
"This time around I feel like if I'm playing well I can dictate who's going to win or lose," said Federer.
"It's going to take something special from my opponent to win. That's kind of how it feels right now. Then again, I might walk away on Monday having lost in the first round.
"I will never ever underestimate an opponent ever again. I did that enough when I was a teenager. Those times are long gone.
"I'm just happy how I'm playing. I already reached my goal for the year becoming world number one and getting Wimbledon again and getting a medal for Switzerland. It's been incredible.
"But I do have this one left for me this year where I really, really want to do well, and I couldn't be more happy returning here as number one. It's super exciting."
Nadal absence
Federer, Djokovic and Murray share top billing but the absence of Rafael Nadal is keenly felt in New York.
The Spaniard, who won the title in 2010 and reached the final again last year, has not played since Wimbledon because of a knee injury.
Federer hopes the extended break will mean Nadal can return to the tour fit and healthy later in the year.
"It would be better if he would be here, but then again, it's good to see him maybe giving it a chance to heal and taking tough decisions like not coming here," said Federer.
"It's been a brutal process for him, I'm sure, missing the Olympics, which I'm sure was also a big goal for him. Then the North American swing and now this. This is significant, but it's not been six months yet.
"He's had a great run in grand slams as well and playing so many tournaments. Many people thought he was going to break down way earlier, and he has played I think four years longer than people already expected.
"People thought four years ago the end is very near. None of that. I just hope he's taking a little rest right now and hopefully coming back strong for the end of the year."