Senchenko, 36, who ended Ricky Hatton’s career last November, looked like he was in for a rough night against the Argentinian after the first two rounds, but ultimately found his range and began hitting the target with his trademark stiff jab.
A dominant third round followed until a pounding combination in the fourth put Jerez down and the referee deemed him unable to continue despite the 34 year-old making it to his feet in time.
On top billing, Stas Kashtanov successfully defended his interim WBA middleweight belt against perennial nearly-man Jaime Barboza by dropping the Costa Rican for the count in the tenth round.
The 29 year-old improved his standout record to 31-1 in the process and moved closer to a shot at current title holder Gennady Golovkin, whilst Barboza dropped an eighth defeat and a fifth in his last seven.
Also on the card, light-heavyweight Ismayl Sillakh forced Konstantin Piternov to retire in six rounds and Artem Karpets won a 19th straight since turning pro with a unanimous win over Tobia Loriga at the Ukraine event.
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