Sam Lowes marked his full-time arrival on the World Supersport Championship scene as he claimed the fastest time at the end of the opening day of testing at Portimao.

The reigning British Supersport Champion is charged with keeping Parkalgar Honda as front runners in 2011 following the demise of double runner-up Eugene Laverty, the youngster getting his quest off to an outstanding start with a last gasp quick lap.

Edging beneath the 1min 46secs marker to be substantially faster than David Salom's fastest time from the morning session, though Lowes only topped the timesheets in the dying seconds of the 90-minute session, he had been inside the top three for the majority regardless.

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Indeed, Salom's morning best of 1min 47.134secs was quickly demolished once the afternoon session got underway, with Fabien Foret taking the top spot in the opening minutes and holding it until just five minutes to go when he was usurped by Broc Parkes.

However, the Australian would once again be trumped by his team-mate Salom, only for him in turn to be edged out by Lowes as well. Unsurprisingly, each rider improved on their morning efforts, albeit some more than others, with Lowes's best coming after he slashed 3.5secs off his previous fastest.

Foret held onto fourth place, ahead of Chaz Davies on the once-again impressive ParkinGO Yamaha, while Gino Rea and James Ellison ensured all four British riders featured inside the top seven in sixth and seventh.

Luca Scassa, Florian Marino and Miguel Praia, who crashed towards the end of the session, rounded out the top ten positions.