However, over the course of two comparable nine-lap runs on ultra-soft tyres to simulate the first stint of the race, Verstappen was on average 0.1s faster than Hamilton.
It was the latest in a growing line of pit stop errors in Formula One, including a nasty Ferrari error in the Bahrain Grand Prix that left a mechanic with a broken leg, and the FIA formally summonsed the team to explain what went wrong.
Lewis Hamilton heads into the Chinese Grand Prix determined to put the brakes on Ferrari rival Sebastian Vettel and Sunday's race offers the Briton the ideal opportunity to do just that and open his victory tally for the year.
But they weren't able to show their hand with both Daniel Ricciardo and Max Verstappen retiring within the first five laps.
The two practice sessions were affected by windy, overcast weather along with intermittent drizzles, although no rain is forecast for the rest of the weekend.
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But with the two set to race again this weekend in the Chinese Grand Prix, the 33-year-old Hamilton said he approached Verstappen in Shanghai in a bid to lower the temperature.
"We're quite happy that this is a back-to-back race as that means that we won't have to wait long to get racing again", said Wolff. I think the auto has the pace but we need to make sure we get it to work. "We need everyone in the team to be on it throughout the weekend because it's a joint effort". It will be interesting to see how their reliability will be - as it will be for Renault and us.
Meanwhile, as in Bahrain qualifying last Saturday, a Williams propped up the order with the team's tough start of the season not showing an immediate signs of changing in Practice One. "The vehicle, even though it was quick, it wasn't easy to drive at all", the Finn said.
Raikkonen recorded a faster time in the second sector than Hamilton managed, but ended up 0.007s adrift of the overall session best in second place. "Hopefully [we can make] another step for tomorrow".
Romain Grosjean and Lance Stroll propped up the timesheet after having spun during their qualifying simulation attempts - Stroll lost control at the high-speed right-hander of Turn 8, while Grosjean lost the rear at Turn 11.