Ferrari trailing Mercedes on a Formula 1 Friday is no great surprise based on previous form in 2015, but the magnitude of the deficit in Brazil certainly raised some eyebrows.
Sebastian Vettel's Ferrari lagged behind the fastest of the two Mercedes (driven by Nico Rosberg) by almost a full second in practice for the Brazilian Grand Prix. That's a large gap around what, at 2.677 miles, constitutes the shortest lap on the F1 calendar.
Team-mate Kimi Raikkonen was a further tenth and half adrift, suggesting Ferrari is struggling for single-lap pace so far, on what turned out to be a surprisingly tough day for many drivers.