The UFC Atlanta fight card is one defined by high-profile reputations. More than one former champion looks to return to winning ways, with the headliner featuring the long-awaited return of the great Kamaru Usman, who faces Joaquin Buckley in an explosive welterweight clash.Elsewhere, in the co-headliner, ex-women's strawweight queen Rose Namajunas continues her journey at women's flyweight by taking on Miranda Maverick. There's more, though. So, who exactly is on the card? Let's find out.UFC card tonight: UFC Atlanta main card fightersThe main card fighters are as follows:Welterweight: Kamaru Usman vs. Joaquin BuckleyWomen's flyweight: Rose Namajunas vs. Miranda MaverickMiddleweight: Edmen Shahbazyan vs. Andre PetroskiBantamweight: Cody Garbrandt vs. Raoni BarcelosMiddleweight: Mansur Abdul-Malik vs. Cody BrundageLight heavyweight: Alonzo Menifield vs. Oumar SyKamaru Usman (20-4)One of the all-time welterweight greats, Kamaru Usman, is a former champion who has fallen on hard times. He is on a three-fight losing streak, but is determined to get back in the win column and remind the MMA world exactly who he is.Joaquin Buckley (21-6)Once known for authoring one of the greatest knockouts in UFC history, Joaquin Buckley has finally put everything together. He is no longer a gimmick and is riding a seven-fight win streak, including a recent TKO over Colby Covington.Rose Namajunas (13-7)Former women's strawweight champion Rose Namajunas has struggled to find her footing in the women's 125-pound division. She is coming off a unanimous decision loss to Erin Blanchfield, but will look to rebound and find some consistency.Miranda Maverick (15-5)Miranda Maverick is an under-the-radar women's flyweight. While she isn't exciting, she has been successful, stringing four wins. Now, she is aiming to beat a former champion.Edmen Shahbazyan (14-5)At one point, Edmen Shahbazyan was heralded as a future world champion. Unfortunately, the prediction failed, and he hasn't been on a win streak since his undefeated days. He is, though, coming off a TKO win over Dylan Budka.Andre Petroski (13-3)Riding a three-fight win streak, Andre Petroski has gathered some momentum in the middleweight division, having recently beaten Rodolfo Vieira to earn a crack against a well-known name.Cody Garbrandt (14-6)Ex-bantamweight king Cody Garbrandt is no longer what he once was. A submission loss to a former flyweight in Deiveson Figueiredo has further sullied his image.Raoni Barcelos (19-5)At the helm of a two-fight win streak, Raoni Barcelos is also coming off the biggest win of his career, having handed Payton Talbott his first-ever loss.Mansur Abdul-Malik (8-0)Cody Brundage (11-6)Alonzo Menifield (16-5-1)Oumar Sy (11-0)UFC card tonight: UFC Atlanta prelim fightersA list of UFC Atlanta prelim fighters is as follows:Light heavyweight: Paul Craig (17-9-1) vs. Rodolfo Bellato (12-2-1)Welterweight: Michael Chiesa (18-7) vs. Court McGee (22-13)Bantamweight: Malcolm Wellmaker (9-0) vs. Kris Moutinho (14-6)Flyweight: Cody Durden (17-7-1) vs. Jose Ochoa (7-1)Bantamweight: Ricky Simón (21-6) vs. Camero Smotherman (12-5)Welterweight: Philip Rowe (10-5) vs. Ange Loosa (10-4)Women's flyweight: Jamey-Lyn Horth (11-7) vs. Vanessa Demopolous (7-2)