New Zealand’s UFC Fight Night 110 lineup could soon have a big main event.

A heavyweight matchup between Derrick Lewis (18-4 MMA, 9-2 UFC) and Mark Hunt (12-11-1 MMA, 7-5-1 UFC) is being targeted for the May event’s headlining slot.

People with knowledge of the matchup told MMAjunkie the fight is in the works. They spoke on the condition of anonymity since the potential bout hasn’t been signed or formally announced. Additionally, Hunt is currently under a medical suspension, which runs until April 19, due to a leg injury he suffered in a knockout loss to Alistair Overeem at UFC 209 earlier this month. He’ll first need medical clearance before signing a bout agreement.

UFC Fight Night 110 takes place Sunday, June 11 at Vector Arena in Auckland, North Island, New Zealand. The event airs live on FS1 (on June 10 in the U.S. due to the time difference) following early prelims on UFC Fight Pass.

No fights have been formally announced for the card; Auckland’s only other UFC event took place in 2014 with UFC Fight Night 43.

Lewis is No. 7 in the USA TODAY Sports/MMAjunkie MMA heavyweight rankings, and Hunt is No. 11.

In his most recent bout, 32-year-old Lewis headlined UFC Fight Night 105 and scored a second-round knockout win over Travis Browne in a “Fight of the Night” performance. Afterward, “The Black Beast,” who said he broke his foot in the February fight, told MMAjunkie Radio he wanted to fight Hunt (watch it above).

One fight prior to the Browne win, Lewis headlined his first UFC event and picked up a TKO victory over Shamil Abdurakhimov at UFC Fight Night 102. Lewis has now won six straight UFC fights, and he has 16 knockouts in 18 career wins overall.

Hunt, meanwhile, is looking for his first victory since a knockout of ex-champ Frank Mir in early 2016. Since then, the 42-year-old New Zealand-born Australian has suffered a unanimous-decision loss to Brock Lesnar (later overturned when Lesnar failed a drug test) and the third-round knockout defeat to Overeem. Hunt’s leg was badly bloodied in the fight, and though he initially announced a broken tibia, his camp later clarified he suffered no broken bones, via MMAFighting.com.

Like Lewis, Hunt has a history of stoppages; the former PRIDE fighter has nine knockouts in 12 career victories.

For more on UFC Fight Night 110, check out the UFC Rumors section of the site.