Lewis Hamilton lapped quicker than last year?s pole position time in first practice at Monaco but the top five were covered by less than half a second.
The Mercedes driver established a new record for the current version of the Monaco Grand Prix circuit, which was last changed in 2015.
Monaco Grand Prix practice in picturesThree different cars occupied the top three positions after the first 90 minutes of running. Sebastian Vettel was second-quickest after tapping the barriers on an early run and Max Verstappen rebounded from an early puncture to end the session third.
Less than a tenth of a second covered Verstappen from his team mate, yet the pair were split by the Mercedes of Valtteri Bottas.
Daniil Kvyat impressed with the sixth-quickest time as both Toro Rosso drivers appeared in the top ten. They were separated by Kimi Raikkonen and the first Force India of Sergio Perez.
Monaco newcomer Esteban Ocon joined his team mate in the top ten, just two-tenths of a second splitting the VJM10s. In contrast there was 1.3 seconds between Williams? experienced Felipe Massa in 11th and rookie Lance Stroll in 16th.
Jenson Button was 14th-quickest on his return to F1 for McLaren, a tenth of a second off team mate Stoffel Vandoorne.
Two drivers failed to set a time. Nico Hulkenberg?s Renauilt and Marcus Ericsson?s Sauber were not seen after their installation runs due to technical problems.
First practice visual gaps
Lewis Hamilton ? 1?13.425
+0.196 Sebastian Vettel ? 1?13.621
+0.346 Max Verstappen ? 1?13.771
+0.366 Valtteri Bottas ? 1?13.791
+0.429 Daniel Ricciardo ? 1?13.854
+0.686 Daniil Kvyat ? 1?14.111
+0.739 Kimi Raikkonen ? 1?14.164
+0.776 Sergio Perez ? 1?14.201
+0.908 Carlos Sainz Jnr ? 1?14.333
+1.000 Esteban Ocon ? 1?14.425
+1.192 Felipe Massa ? 1?14.617
+1.388 Stoffel Vandoorne ? 1?14.813
+1.445 Kevin Magnussen ? 1?14.870
+1.896 Romain Grosjean ? 1?15.321
+2.170 Lance Stroll ? 1?15.595
+2.524 Jolyon Palmer ? 1?15.949
+2.833 Pascal Wehrlein ? 1?16.258
Drivers more then ten seconds off the pace omitted.
Best times by tyre
2017 Monaco Grand Prix
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2017 F1 practice sessions
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