Correction: An earlier version of this article misstated Novak Djokovic's 2017 record. It is 32-8, not 32-9.

While more than five full months still remain in 2017, the title of "Sportsman of the Year" may already be out of reach due to the inspired play of one tennis legend. Roger Federer has overcome past injuries to recapture his superstar form at age 35, with wins at the Australian Open in January and Wimbledon on Sunday, and his 31-2 record makes a convincing early case for the year's best athlete.

And he may not be done yet.

According to online betting site Bovada, Federer is the early favorite to win the 137th U.S. Open, the final Grand Slam of 2017. The Swiss superstar is listed at +200 and well ahead of his notable competitors. Should Federer win, it will mark the first time he's won three Grand Slams in the same year in 10 years. It would also make for quite an accomplishment considering the 19-time champion skipped the French Open, though the tournament has been consistently dominated by Rafael Nadal.

Federer, who was absent from Flushing Meadows in 2016 because of a left knee injury, won all five of his U.S. Opens titles from 2004-2008. He reached the final in 2009 and 2015 and appeared in three semifinals over the past eight competitions. 

Federer's path to the U.S. Open title will likely go through some familiar faces. Nadal, Andy Murray and Novak Djokovic are all listed at +400. 

Nadal has won the hardcourt tournament twice (2010 and 2013), but has struggled in recent years. The Spaniard didn't compete in 2014 and only reached the third round in 2015 and just the fourth round in 2016. Still, Nadal has looked inspired this year, having reached the Australian Open final—the Grand Slam that has given him the most trouble over his illustrious career.

Murray hasn't advanced to the U.S. Open semifinals since winning the tournament in 2012. The Scot has also struggled to just a 25-10 record in 2017, with poor results in Grand Slams compared to last year. In 2016, Murray reached the finals of the Australian Open and French Open, and won Wimbledon. He also advanced to the U.S. Open quarterfinals. But this year Murray was eliminated in the fourth round of the Australian Open and reached the semis at Roland Garros before falling the quarters at Wimbledon. A strong showing for Murray in New York would salvage what has otherwise been a forgettable year.

Djokovic appears to be Federer's top competition at the U.S. Open. Though the Serb has struggled by his own standard in 2017 with a 32-8 record, he consistently goes deep in the tournament. He reached the final last year, losing to Stan Wawrinka in four sets, and won the tournament in 2015. It was the second time Djokovic won the U.S. Open, and he has reached the final a total of seven times since starting his Grand Slam career in 2005.

After the top names, the rest are considered major underdogs—even for the defending champion. Wawrinka is listed at +1,200  and just ahead of Marin Cilic (+1,400). Juan Martin del Potro follows at +2,000.

Every American is a major longshot to win the U.S. Open. Jack Sock and Steve Johnson are both listed at +6,600, while John Isner is at +10,000. Sam Querrey, who reached the semifinals at Wimbledon, has yet to be listed by Bovada.

The U.S. Open begins on Aug. 28 with the men's final set for Sept. 10.

Current ATP Rankings And Betting Odds (Bovada.lv)

1. Andy Murray (+400)

2. Rafael Nadal (+400)

3. Roger Federer (+200)

4. Novak Djokovic (+400)

5. Stan Wawrinka (+1,200)

6. Marin Cilic (+1,400)

7. Dominic Thiem (+2,500)

8. Kei Nishikori (+2,200)

9. Milos Raonic (+2,000)

10. Grigor Dimitrov (+3,300)

11. Alexander Zverev (+2,500)

12. Jo-Wilfried Tsonga (+6,600)

13. Gael Monfils (+5,000)

14. David Goffin (+8,000)

15. Tomas Berdych (+5,000)

16. Pablo Carreno Busta (NA)

17. Jack Sock (+6,600)

18. Lucas Pouille (+8,000)

19. Roberto Bautista Agut (NA)

20. Nick Kyrgios (+2,000)