Video by Declan Taylor

Chris Eubank Jr won the final eliminator for Daniel Jacobs' WBA middleweight title after overpowering tough Irishman Gary O'Sullivan in seven rounds at The O2.

An action-packed fight concluded after the seventh when O'Sullivan's corner withdrew him from the contest with the 31-year-old from Cork fading before Eubank's onslaught.

Eubank, watched by his father Chris at ringside, looked set for an early stoppage when he repeatedly landed with the right uppercut in the second, but O'Sullivan showed resilience to survive a one-sided round.

By the third O'Sullivan had rallied, however, and Eubank wobbled when he was struck by a right as a thrilling three minutes ebbed and flowed.

The sixth began with a wild slugfest as Eubank went in search of the knockout amid cries of 'Eubank, Eubank', but remarkably O'Sullivan remained standing, despite having taken some of his best shots.

The seventh was the quietest round yet, but the damage had already been done and O'Sullivan was withdrawn.

"It's very satisfying to now have the chance to fight for the WBA title. Gary's got a chin, I'll give him that," Eubank Jr said.