Valtteri Bottas led a Mercedes one-two in front of Lewis Hamilton to complete Friday's practice sessions ahead of this weekend's British Grand Prix.
Hamilton leads the world championship by 31 points from the Finn as he looks to win in Britain for a record sixth time this weekend, but he was pipped his team-mate to top spot at Silverstone by just 0.069 seconds following second practice.
The Silverstone track has been resurfaced ahead of the race and drivers struggled for grip in the session as the asphalt required cars to lay down rubber on the track through accumulated laps.
Romain Grosjean spun in the pitlane early in practice for the British Grand Prix
The Haas driver was making his way out the pitlane to start an outlap
But turning right preparing to join the track, he spun as he tries to correct the error
He could not prevent his Haas car careering into the barrier, breaking his front wing
But no driver struggled more than Romain Grosjean who suffered the embarrassment of spinning out in the pitlane during the first session in the morning.
The Haas driver was making his way to start an outlap only to spin once he had passed the pitlane speed limit and negotiated what was otherwise a basic right turn.
After losing his front wing by crashing into a barrier, the Frenchman had no choice but to drive a short way back down the pits, where he could turn round and make a second attempt at joining the track.
Facing the wrong way, Grosjean was forced to drive back down to the the pits to turn around
Grosjean makes his way down the wrong way of the pits in an attempt to turn the car round
Forbidden from going back into the pitlane, Grosjean was forced to spin round to exit the pits
Lewis Hamilton passed the stricken Grosjean as he tried to recover in the pitlane
The crash saw his front wing fall off and left debris in the pitlane as he makes his second exit
The Frenchman's front wing broke off the car in the embarrassing crash during practice
Bits of his damaged front wing were littered onto the track as he made his way round before pitting to get his car fixed in a wasted run.
To make matters worse, once he did exit the garage he spun again on the circuit, perhaps showing a complete lack of confidence in his car as he ended the morning 19th fastest.
It sums up his worst season in F1 so far, where he has just two points - 12 less than team-mate Kevin Magnussen leaving him 17th in the championship.
Grosjean had to tour the track slowly before re-entering the pits again
A virtual safety car was called as bits of his Haas car fell onto the track