The Portuguese teenager placed third, two short of his maiden pole position two weeks ago at Assen, but his third front-row start in succession.
Team-mate Efren Vazquez qualified seventh, heading the third row, but frustrated that another rider had baulked his last-lap effort to claim his first front-row of the year.
The Spaniard finished Saturday’s first day of free practice third overall, proving his potential as he regains strength after earlier injury.
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