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Tom Sykes returned to the top of the World Superbike time sheets after posting the fastest lap in FP4 ahead of yet another pole position bid.
The Englishman secured his 29th pole in Jerez last time out and will feel well placed to secure a 30th on Saturday afternoon after he edged team-mate Jonathan Rea into second by 0.069 secs.
The all-British quartet of Sykes, Rea, Chaz Davies and Leon Haslam have been closely matched throughout the weekend's four sessions, bar Rea's run to P1 on Friday afternoon.
Again they were closely packed together at the right end of the top ten here, Davies and Haslam demonstrating Sunday's two races should be anything but straightforward for the Kawasaki pair.
Sykes' fastest time of 1m 37.918s was one of ten laps that fell in the 1m 37/8s. Rea once again showed consistency will not be an issue at his end as he matched those times on 13 occasions, with twelve coming back-to-back on his first run.
Niccolo Canepa was one of two crashers in the session. The Italian nevertheless held fifth spot at the close of the half hour, a place ahead of Alex Lowes who underlined his pace to run well inside the top six come Sunday.
In similar fashion to Jerez, Michael van der Mark looked to have found a vital step in set-up before qualifying. The Dutchman ended FP4 in seventh after bike problems restricted his track time on Saturday morning.
Behind came Ayrton Badovini, Jordi Torres and IDM Superbike champion Markus Reiterberger, who is making his second appearance in the world championship this season.