Boxing divisional rankings: Why Wilder's win wasn't enough to join top 10 at heavyweight

Q: Why didn't Deontay Wilder enter ESPN's heavyweight rankings after beating Derek Chisora?

Wilder's split-decision win over Chisora was not enough to move him back into ESPN's heavyweight top 10. The article says the victory should still help Wilder land at least one more major fight before he retires.

Q: How did Deontay Wilder beat Derek Chisora?

Wilder beat Chisora by split decision in an entertaining but sloppy fight. He scored two knockdowns, but he also lost a point for an illegal push.

Q: What changed in the cruiserweight rankings after Viddal Riley's win?

Viddal Riley moved up from No. 9 to No. 7 at cruiserweight after a one-sided decision over Mateusz Masternak. The article says the win could put Riley in position for a world title shot soon.

Q: Why did Yukinori Oguni move into the junior featherweight rankings?

Oguni entered the junior featherweight rankings at No. 10 after upsetting Marlon Tapales by unanimous decision. He survived an early push from Tapales and wore him down with body shots as Tapales faded late.

Q: Why was Marlon Tapales removed from the rankings?

Tapales was removed after losing to Yukinori Oguni and announcing that he would move up to featherweight. ESPN's rankings note that fighters who announce a permanent move to another weight class are ranked in the new division only after they fight there.

Deontay Wilder defeated Derek Chisora by split decision in an entertaining and somewhat sloppy slugfest between aging heavyweights over the weekend. The win wasn't enough for Wilder to re-enter ESPN's heavyweight rankings, but it should be enough to secure him at least one more big fight before the former WBC heavyweight champion retires.

Wilder scored two knockdowns against Chisora, but was also docked a point for an illegal push, in what was Chisora's final pro fight. "The Bronze Bomber" may not be the devastating force that he once was, but Wilder remains a factor in an evolving heavyweight division.

While Wilder's win didn't affect the heavyweight rankings, Viddal Riley climbs at cruiserweight after a one-sided decision over Mateusz Masternak in the co-main event. The victory could position Riley to challenge for a world title in the near future. After upending the veteran with a strong jab and right hand, Riley moves up from No. 9 to No. 7.

The biggest shakeup came in the junior featherweight division, following Yukinori Oguni's shocking unanimous decision win over Marlon Tapales.

The former two-division and unified junior featherweight champion was a huge favorite against Oguni, who was on the verge of retirement entering the fight. Entering the bout, Oguni was 2-2-2 in his last six fights. However, Oguni weathered an early storm from Tapales, who came in overweight, and then committed to a sustained body attack that wore on the former champion. Tapales faded down the stretch, earning Oguni the biggest win of his career.

Tapales announced that he would move to featherweight following the loss and has been removed from the rankings, while Oguni's win earned him the No. 10 spot.

ESPN's divisional boxing rankings highlight the best in the sport in every weight class. Rankings will change based on recent results and performances. Fighters who have announced they are moving to a different weight class will be ranked in that new division, if warranted, only once they fight in that weight class. Fighters who currently own titles in two divisions can be ranked in both.

Fighters who haven't competed in the past 12 months -- and don't have a fight scheduled -- will be dropped from the rankings until they fight again. Any fighter who tests positive for a performance-enhancing substance will also be removed. That boxer will be eligible to reenter the rankings after his next bout.

For a list of the current champions in all weight classes, click here. For ESPN women's divisional rankings, click here.