Hatton (45-3, 32 KOs) retired over three years ago after being knocked out in the second round by Manny Pacquiao on May 2, 2009.
Senchenko (33-1, 22 KOs), who was coming off a ninth-round TKO loss to Paulie Malignaggi on April 29, stunned Hatton with a left hook. Hatton was counted out with eight seconds left in the ninth round.
Following the fight, the 34-year-old Hatton announced he was ending his career, again.
