Stroll used the Hyper Soft compound to set his time, whereas Robert used the standard soft as his softest compound.
RK will be using the Super Soft Ultra Soft and Hyper Soft in the Wednesday afternoon session when he is on a 'performance based session.'
The Hyper Soft is two compounds softer than the Ultra Soft.
For reference Stroll managed a fastest race lap on Sunday of 1'42''324, that in itself overly flattering given his late third stop for Ultra Soft tyres as a result of flat spotting his previous two sets. (Massa's fastest race lap was 1'43''026)
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