Jonas, a two-weight world champion and Olympic veteran, will defend the belt in front of a hometown crowd in Liverpool, as American Mayer once again ventures to the UK.
Jonas, 39, collected the IBF belt last year after becoming unified champion at super-welterweight in 2022, while Mayer, 33, is a former super-featherweight champion.
Mayer held two titles in that division until her narrow loss to Alycia Baumgardner in 2022, but she bounced back with an interim-title win at lightweight in 2023, before moving up a division again. Now she moves up one more time to challenge Jonas in enemy territory.
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When is the fight?
Jonas vs Mayer will take place on Saturday 20 January at the M&S Bank Arena in Liverpool.
The event is due to begin at 7pm GMT (12pm PT, 2pm CT, 3pm ET), with ring walks for the main event expected at 10.15pm GMT (3.15pm PT, 5.15pm CT, 6.15pm ET).
How can I watch it?
In the UK, the event will air live on Sky Sports Arena from 7pm GMT (12pm PT, 2pm CT, 3pm ET) and Sky Sports Main Event from 8pm GMT (1pm PT, 3pm CT, 4pm ET). It will also stream live on the broadcaster’s Sky Go app. In the US, the fights will stream live on ESPN+.
If you’re travelling abroad and want to watch the event, you might need a VPN to unblock your streaming app. Our VPN round-up is here to help and includes deals on VPNs in the market. Viewers using a VPN need to make sure that they comply with any local regulations where they are and also with the terms of their service provider.
Jonas – 4/6
Mayer – 5/4
Draw – 14/1
Fight card (subject to change)
Natasha Jonas (C) vs Mikaela Mayer (IBF women’s welterweight title)
Jack Cullen (C) vs Zak Chelli (British and Commonwealth super-middleweight titles)
Karriss Artingstall vs Lila dos Santos Furtado (featherweight)
Ste Clarke vs Vasif Mamedov (middleweight)
Aaron McKenna vs Mickey Ellison (super-middleweight)
Mark Jeffers vs Germaine Brown (super-middleweight)