A lack of running in Monaco on Thursday means that Saturday will be very much a step into the unknown for the F1 teams , and all will have a lot of work to do in final practice.
New asphalt, new barrier locations and low temperatures alter the characteristics of the Monaco street circuit.
P Zero Red Supersoft, with a completely new compound, makes its GP debut on the slowest and most twisty circuit of the year.
Tyres are back in the spotlight this week, as Formula 1 chiefs meet to discuss the future of the sport. Adam Cooper analyses the tyre rules proposals and their viability.
Formula 1 tyre supplier Pirelli has unveiled its selection of tyre compounds for the upcoming races in Spain, Monaco, Canada and Austria.
Falling track and air temperatures add extra complexity to strategy decisions.
Track temperatures fall as the race goes on.
Two-stop strategies for the majority of drivers, with other variations further down the field
Different tactics for Mercedes and split strategies for Hamilton and Rosberg: on the podium for the second time this year.
Tropical climate makes it likely for 2015 Cinturato intermediate and full wet tires to make their competitive debut.
Increase in performance confirms the data collected in pre-season testing.
Two pit stops expected for the majority of runners tomorrow.
Lap times may be up to two seconds faster than last year: A gap of more than one second expected between soft and medium.
Teams continue season preparation by trying out all the tyres in Barcelona apart from the full wet.