Experts' picks: Is it Roger Federer time, again, at the Australian Open?

MELBOURNE, Australia -- Sometimes things really aren't as complicated as they seem. You can thank Roger Federer for that. 

Despite having 128 players in the men's draw, and a lot of talent, not many folks -- certainly not our experts -- believe anyone will unseat the defending champ Down Under. And why would anyone doubt a player who is healthy, happy and coming off his best season in more than a decade? It's a rhetorical question, unless, of course, you think Rafael Nadal has a shot. 

The Federer sweep aside, who do our experts believe will thrive at the Australian Open, which starts Sunday, 7 p.m. ET on ESPN2 and the ESPN App? Have a look:

Men's singles