<p>Valtteri Bottas completed a sweep of Portuguese Grand Prix practice on Saturday with Mercedes team mate and Formula One championship leader Lewis Hamilton second fastest.</p>.<p>The Finn, quickest in both Friday's sessions at the Algarve circuit near the southern city of Portimao, lapped with a best effort of one minute 16.654 seconds.</p>.<p>Hamilton, the six-time world champion who can take an outright record 92nd career win on Sunday after equalling Michael Schumacher's milestone, was 0.026 slower on a sunny but cool morning.</p>.<p>Both drivers made errors, with Hamilton tracking through the gravel at one point.</p>.<p>Red Bull's Max Verstappen was third fastest, 0.158 off the pace, with AlphaTauri's Pierre Gasly -- whose car caught fire on Friday -- fourth on the timesheets.</p>.<p>The session was ended a minute early after a drain cover came loose at the exit of turn 14 as Sebastian Vettel's Ferrari went over it.</p>.<p>Mercedes have qualified on pole for every race so far this season and look set to extend that run to 12 in a row later on Saturday.</p>.<p>The team can also clinch a record seventh successive constructors' title on Sunday if results go their way, although Red Bull's form is likely to keep them waiting at least another week.</p>.<p>Hamilton is 69 points clear of Bottas after 11 races. </p>
<p>Valtteri Bottas completed a sweep of Portuguese Grand Prix practice on Saturday with Mercedes team mate and Formula One championship leader Lewis Hamilton second fastest.</p>.<p>The Finn, quickest in both Friday's sessions at the Algarve circuit near the southern city of Portimao, lapped with a best effort of one minute 16.654 seconds.</p>.<p>Hamilton, the six-time world champion who can take an outright record 92nd career win on Sunday after equalling Michael Schumacher's milestone, was 0.026 slower on a sunny but cool morning.</p>.<p>Both drivers made errors, with Hamilton tracking through the gravel at one point.</p>.<p>Red Bull's Max Verstappen was third fastest, 0.158 off the pace, with AlphaTauri's Pierre Gasly -- whose car caught fire on Friday -- fourth on the timesheets.</p>.<p>The session was ended a minute early after a drain cover came loose at the exit of turn 14 as Sebastian Vettel's Ferrari went over it.</p>.<p>Mercedes have qualified on pole for every race so far this season and look set to extend that run to 12 in a row later on Saturday.</p>.<p>The team can also clinch a record seventh successive constructors' title on Sunday if results go their way, although Red Bull's form is likely to keep them waiting at least another week.</p>.<p>Hamilton is 69 points clear of Bottas after 11 races. </p>