Back in action in London after deciding not to retire in the aftermath of his second defeat to Dillian Whyte in December, 'Del Boy' largely flattered to deceive, primarily as the result of his lighter opponent's evasive and negative tactics.
Giving up almost three stone to Chisora, Gashi looked to avoid or hold the 35-year-old whenever possible, making for a hugely underwhelming contest that will not live long in the memory.
While he failed to land many shots of significance, the home favourite, who is aiming to get back into title contention and battle the likes of Joseph Parker or Oleksandr Usyk, was never remotely troubled and took the victory on the scorecards, 100-90, 100-91, 99-91.
Chisora-Gashi ended up being the co-main event on the Greenwich Peninsula, with a bumper night of boxing eventually headlined by another heavyweight bout between the popular Allen and former WBA regular champion Browne.
Browne, looking in terrific shape, began the fight in far superior fashion, landing uppercuts at will and making the 'White Rhino' appear far out of his depth.
However, Allen secured a stunning third-round knockout with a sickening left hook to the body that caught Browne under the elbow, knocking the wind out of the 40-year-old Australian, who was promptly counted out.
On the undercard, Josh Kelly successfully defended his WBA International welterweight title with a unanimous decision victory over the resilient Przemyslaw Runowski.
Wales' Joe Cordina added the British lightweight gold to his Commonwealth and WBA International belts with an accomplished sixth-round stoppage of Andy Townend and Conor Benn got some valuable rounds under his belt with a straightforward points defeat of Josef Zahradnik.
Shannan Courtenay beat Roz Mari Silyanova, Nikita Ababiy stopped Dimitri Faltin, Sam Cox saw off Georgi Georgiev and Jozef Jurko was defeated by Sam Hyde. John Harding Jr was also victorious over Miroslav Juna.
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