From here, Checa didn't look back, lapping consistently faster than Biaggi to eke out his advantage over the remaining laps. However, just as he was beginning to ease off in search of the chequered flag, the Althea Ducati simply coasted to a standstill.
A cruel end to a peerless ride, Checa calmly parked the bike and returned to the pit lane as he was left to imagine what could have been.
Checa's retirement played firmly into the hands of Biaggi, who subsequently took the lead and kept it neat and tidy through the final two laps to cross the line as the winner.
An additional boost for his title hopes, Biaggi's reins Haslam in by five points as a result, bringing the margin between the two back down to ten points.
While Biaggi's race was fairly uneventful, Haslam was made to work hard for his podium as he battled back from a bad start, one that left him down in ninth position at the end of the first lap, to finish in second position.
Haslam certainly wasn't aided by the smokescreen being emitted by the Ducati of Jakub Smrz, the Czech rider completing almost a lap before realising his PATA B&G machine was set to expire.
Prompting Haslam to sit up and motion to the marshals, once Smrz had pulled off the circuit, the Briton pushed on, gaining two positions on lap three when Jonathan Rea, still smarting from his accident during Superpole, suffered another tumble and took Cal Crutchlow onto the grass with him.
Dropping Crutchlow outside the top ten and Rea, who gallantly got back on the bike, to the back of the field, Haslam was up to sixth and chasing Haga and Corser, the Suzuki rider proceeding to pass both riders in a move befitting of a potential world champion.
With Haga following through, the pair swiftly tracked down third place Camier, but with the Briton making no noticeable errors through the bends, neither had the grunt to out pace the Aprilia in a straight line.
Eventually, Haslam bullied his way past his countryman on lap 16, with Haga following through soon afterwards when Camier, seemingly struggling with his tyres, ran wide.