BoxRec

12 rounds.
At 140.
Loma,if thinking smart,would probably just weigh the minimum of 136, to make Jr WW.
This way, he'd maintain enough speed and elusiveness to enable effective utilization of his offensive and defensive assets.
I see Loma winning this by a decisive decision. 8-4, or 9-3.
Hatton Would have his moments, early on, but I see him getting too tired and frustrated by the 7th round and onwards.
Styles make fights would be in a rather proverbial format of example to boxing fans for this particular Vasily performance.

loma is small at 135 as it is....he'd be tiny at 140 .and he doesnt like ball shots and rough stuff. so though loma is better p4p, hatton might just roughhouse and maul him and pull off a salido type win...probably wider tbh

Hatton

Loma. Tough fight for him because Hatton was bigger but prime v prime I think he outpoints him

Pro's
Lomachenko had 18 fights.
Hatton had 48 fights.
Stylewise Lomachenko is hard to beat if the opponent is lacking in fundamentals.
140 makes me lean toward Hatton.

Lomachenko is a way, way better fighter, but he'd need all those skills to get past the aggression and size advantage Hatton has. Hatton was a strong 140, Loma isn't even a strong Lightweight. I think Hatton's size and strength probably winds up being too much somewhere over the course of this fight, but a Loma decision wouldn't be that shocking either.