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Davide Giugliano sped to his second pole position of 2015 after gaining a tow from Tom Sykes in the second World Superbike Superpole session at Portimão.
Sykes looked to have claimed a fourth consecutive pole position at the Algarve track, a record he started in 2012, until Giugliano took advantage of his draft to snatch top spot away by 0.11s.
The session was also notable for a crash for championship leader Jonathan Rea, who, although uninjured, will be forced to start Sunday's races from the third row of the grid.
Rea had been setting the early pace when he fell in the final sector of Portimão's undulating curves, meaning he could take no further part in the fifteen-minute session.
The lowly starting position may ultimately prove costly as the Ducatis of Giugliano and Chaz Davies, third fastest this afternoon, look to have made a step forward in terms of speed.
Likewise, Sykes was pleased to start from the front row after initially appearing frustrated that he had unwillingly given the pole-man a tow.
Heading the second row, Alex Lowes completed a remarkable turnaround by posting the fourth fastest time. The Voltcom Suzuki man only qualified for SP2 via the earlier 15-minute session on a weekend which has seen his team compete deal with a variety of issues.
Fastest in FP4, Leon Haslam would have to settle for the fifth fastest time, one place ahead of Matteo Baiocco, whose best lap came when following fellow-Ducati runner Chaz Davies.
Reigning world champion Sylvain Guintoli completed his best qualifying performance of his title defence with the seventh fastest time while Jonathan Rea eventually slipped to eighth.
Unable to get the best from the tow provided by his Aprilia team-mate Jordi Torres was ninth fastest at his third consecutive new track. So impressive all weekend, Ayrton Badovini will be disappointed to only have placed tenth.