ESPN's MMA divisional rankings: Women's bantamweight

Nunes stops Rousey in 48 seconds (0:27)

Ronda Rousey's return to the Octagon only lasts 48 seconds as Amanda Nunes wins by TKO to defend the UFC women's bantamweight title in Las Vegas. (0:27)

Who is the world's best women's bantamweight fighter? My latest top 10 ranking is listed below, with Amanda Nunes leading the way at No. 1.

Who is the best fighter regardless of weight class? See ESPN's pound-for-pound rankings. Plus, check out our men's pound-for-pound rankings.

Note: Results through Jan. 3.

= champion

Amanda Nunes

1. Amanda Nunes
Record: 14-4
Next: TBD

A sensational performance at UFC 207 has Nunes on top of the world. She's wearing a belt that has proven difficult to hang on to, but based on this latest win -- over Ronda Rousey -- perhaps Nunes is the right woman for the job.

Julianna Pena

2. Julianna Pena
Record: 8-2
Next: UFC Fight Night on Jan. 28, vs. Valentina Shevchenko

We're only scratching the surface of Pena's potential, but a win over Cat Zingano at UFC 200 has her surging up the 135-pound ladder. She's a contender to keep an eye on.

Valentina Shevchenko

3. Valentina Shevchenko
Record: 13-2
Next: UFC Fight Night on Jan. 28, vs. Julianna Pena

Four months after suffering a loss to now-champion Amanda Nunes, Shevchenko earned the biggest win of her career by outclassing Holly Holm in Chicago. It's not clear whether a Nunes rematch would look any different, but this is a wild division. Anything can happen.

Holly Holm

4. Holly Holm
Record: 10-2
Next: UFC 208 on Feb. 11, vs. Germaine de Randamie

Holm received the opportunity of a lifetime in 2015 and took full advantage of it, knocking out Ronda Rousey with a highlight head kick. It's been tough sledding since. Holm has lost two fights in a row for the first time in her combat sports career.

Raquel Pennington

5. Raquel Pennington
Record: 9-5
Next: TBD

Pennington has turned a corner by winning her last four bouts. The victory over Miesha Tate at UFC 205 finally got her some overdue attention. She'll be looking to turn that into a big fight.

Ronda Rousey

6. Ronda Rousey
Record: 12-2
Next: TBD

A long-awaited return quickly turned into a nightmare, as Rousey lasted a mere 48 seconds against Amanda Nunes in December. This may be the end.

7. Sara McMann
Record: 10-3
Next: TBD

Looking to make her second UFC title run, McMann is in a good spot following back-to-back wins over Jessica Eye and Alexis Davis. As always, her wrestling ability makes her a tough opponent for anyone and with the UFC belt seeming to change hands by the minute, don't count McMann out of the title picture.

Cat Zingano

8. Cat Zingano
Record: 9-2
Next: TBD

Zingano lost to Julianna Pena in a comeback fight at UFC 200, but hopefully that won't send her away from the sport for long. She took a long break in 2015 after a lightning-quick loss to Ronda Rousey in February. Despite a disappointing result in her return, Zingano still has a plenty of promise.

Tonya Evinger

9. Tonya Evinger
Record: 18-5
Next: TBD

Evinger is still the Invicta FC champion, following a successful appeal of her loss to Yana Kunitskaya in November. Evinger was originally submitted in the bout, but a referee error had a major impact. She has not suffered a loss since 2011.

Alexis Davis

10. Alexis Davis
Record: 17-7
Next: TBD

Davis did not look sharp in her return from a lengthy layoff, but that was almost expected considering the time off and the difficult opponent, Sara McMann. At 32, Davis likely still has gas in the tank, although she'll want to prove that in her next outing.