Antonio Giovinazzi made it a clean sweep of wins for Prema Racing with an assured drive in the GP2 sprint race at Spa-Francorchamps as Pierre Gasly extended his lead with an impressive run to fourth.
Having fluffed his victory chance with a poor start from pole in the feature race, Giovinazzi made a better get-away from third this time to run second initially behind reverse grid pole sitter Gustav Malja.
Pouncing for the lead at Les Combes on lap eight, Giovinazzi proceeded to pull clear thereafter, the Italian notching up his third win of the season, one that lifts him back to second in the overall standings behind Prema team-mate Gasly.
Rapax's Malja held firm for his maiden GP2 podium for a fourth straight points' finish, with rookie Luca Ghiotto rounding out the podium in the Trident car.
Gasly, meanwhile, gave his title prospects a huge boost with a charging drive from eighth to fourth place, despite damaging his front-wing on the opening lap after contact. Spurred on by a magnificent pass on Oliver Rowland at Eau Rouge, Gasly was one of the few drivers to make gains in the race as he upped his advantage to 17 points over his team-mate.
Behind him, Raffaele Marciello kept himself in the hunt with a fifth place finish from British trio Alex Lynn, Jordan King and Rowland.
Erstwhile championship leader Sergey Sirotkin, meanwhile, endured another tough day, struggling to make progress before a controversial last corner collision with countryman Artem Markelov in which he speared the Russian Time driver into retirement within sight of the chequered flag.