Ford’s Mark Winterbottom holds a one-point lead in the V8 Supercar championship after winning both of Saturday’s 60km races in Perth.

The Prodrive Racing Australia driver, who earlier in the day secured his first pole position in over a year, dominated the two 25-lap races at Barbagallo Raceway.

After holding off teammate Chaz Mostert to secure his first race win of 2015 in Saturday’s opening race, Winterbottom led from wire-to-wire in the second race to complete a clean sweep.

The victories lift the 2013 Bathurst champion from sixth to the lead of the championship by just one point from defending champion Jamie Whincup, who bounced back from a 16th-place finish in the opening race to come second in the second event.

Holden’s Fabian Coulthard held off Mostert on the final corner of the second race to snare his own spot on the podium while veteran Craig Lowndes’ bid for an unprecedented 100th V8s race win will have to wait.

Lowndes, who briefly held the championship lead after the first race, finished fifth in the second race and is a mere four points behind Winterbottom as the title race tightens.

Holden Racing Team’s James Courtney, who came into the event second in the standings and 23 points off the championship lead, continued his poor run in Perth with a 10th place and sixth place to leave him with plenty of ground to make up.

The Perth Supersprint wraps up on Sunday with an 83-lap 200km race.