Ranking the remaining men's title chances in a wide-open Aussie Open field

Andy Murray and Novak Djokovic, the world Nos. 1 and 2, have both been dispatched, which means there will not only be a new men's champion but two new finalists at the Australian Open for the first time since 2014.

With the quarterfinals in the top half of the bracket set, the fourth round in the bottom half to be decided Monday, and just 12 men still standing, let's rank the championship potential of the remaining competitors.

Tier 1: The contenders

1. Stan Wawrinka

Wawrinka has long struggled with consistency and focus, but in recent years he's been murder just about any time he makes the second week at a Slam. Murray figured to be Wawrinka's biggest roadblock to the finals, and now that he's out of the picture, that burden will likely fall on Roger Federer, whose stamina will be tested in a big way in the coming days. And if Wawrinka emerges from his half of the draw, well, he doesn't really lose finals these days. The past 12 he's played:

2. Milos Raonic

Raonic was the second-best player at this tournament a year ago, and his finals bid was derailed mostly by an untimely adductor injury. Aside from a bizarre but brief hiccup in the third round against Gilles Simon, he's looked every bit as daunting this year in Melbourne, even while battling an illness. The courts are playing a tad faster than they have in the past, which only stands to benefit the rocket-armed Canadian. And perhaps most importantly, his path to the finals looks clearer than anyone else's right now.

3. Roger Federer

Federer's late-career act gets more impressive every year, every tournament, every time he takes the court. He may not be the explosive mover he once was, but damned if he doesn't still dominate with his serve, or control points with creativity, touch, and geometric genius as effectively as he ever has. He's looked dangerous, and he caught a huge break when Mischa Zverev knocked off Murray, who he would've played in the quarters. But he hasn't yet had to face the kind of powerhouse player who can take the racket out of his hand, and he may have to go through two such players - in Wawrinka and Raonic - to win his 18th major title.

Tier 2: The wild card

4. Rafael Nadal

Nadal will have a chance to build on the momentum from his rousing five-set win over Alexander Zverev, when he takes on Gael Monfils in the fourth round. Nadal has won 12-of-14 career matches against Monfils, including four straight, and should be a strong favorite. He'll need to be in top form to get past Raonic - who's beaten him twice in a row, including in Brisbane earlier this month - to make the semis. But if he does, it's going to be very, very tough to slow him down.

Tier 3: Flying under the radar

5. Grigor Dimitrov

Dimitrov followed up his fabulous week in Brisbane with a squeaky-clean first week in Melbourne, suggesting he really has figured some things out and turned over a new leaf. With a fourth-round matchup against Denis Istomin on tap, he's the most likely player in the bottom half to advance, and he beat his probable quarterfinal opponent (Raonic) in straight sets two weeks ago. After a couple years in the wilderness, Dimitrov may finally be ready to cash in on his talent.

6. Jo-Wilfried Tsonga

If Wawrinka doesn't have his usual second-week magic, don't rule out a title push for Tsonga, who made his first and only Slam final at this same tournament nine years ago. Since then, he's bowed out in the quarterfinals eight times and in the semis five times. Beating Wawrinka and Federer back-to-back would take a herculean effort, but Tsonga has the game to do it, provided those guys both experience a slight dip in their level. If he can pull it off, he'd likely be rewarded with a more beatable opponent in the finals.

Tier 4: A wing and a prayer

7. Dominic Thiem

Thiem will get a good crack at punching through to his second major semifinal, and it wouldn't be a shock to see him oust David Goffin and Dimitrov. From there, though, he'd need a couple things to break his way, starting with someone taking out Raonic.

8. David Goffin

Goffin stands a decent chance of getting past Thiem (he's 3-1 against him on hardcourts), and after that, it's sort of anybody's best guess. He's played just four matches combined against his likeliest quarterfinal and semifinal opponents. He and Dimitrov have similar games and would be on relatively even footing, but he's struggled to handle to Raonic's pace, and Nadal - who basically does everything Goffin does but better - would be a matchup problem.

9. Gael Monfils

All things being equal, Monfils would slot in ahead of Goffin and Thiem, and possibly even Dimitrov. But things are not equal, and Monfils has a considerably tougher road that any of those guys. He'll have to beat Nadal - who's owned him - just to make quarters, and then he'll likely get Raonic, whose power has overwhelmed him in three of their past four meetings. Survive that somehow, and he'd still be two wins from the title. Good luck.

10. Roberto Bautista Agut

You can bet everyone in the bottom half is praying Bautista Agut can upend Raonic, but they're unlikely to get their wish. The Spaniard has lost all four matches he's played against the world No. 3, winning just one of nine sets. Even if he can swing the upset (and with the way things are going, all bets are officially off), getting past Nadal or Monfils (who he's a combined 0-4 against) just to make semis will take a borderline miracle.

Tier 4: The giantslayers

11/12. Denis Istomin, Mischa Zverev

These guys have already had the tournaments of their lives, and expecting any more from either at this point is probably expecting too much. Of the two, Zverev is closer to the ultimate prize, but Istomin may have a better chance to keep his run going longer, solely because of who Zverev will have to beat. He was brilliant in taking out Murray, but he won't be catching Federer by surprise. Istomin at least has a small opening, with Dimitrov in the fourth round and one of either Thiem or Goffin after that.

Whatever happens to them from here on out, though, these two guys will have shaped the outcome of this tournament as much as anyone else.