Lewis Hamilton is yet to reach his full potential with his new team, according to his Mercedes boss Ross Brawn.
After claiming pole position in the last three races, Hamilton then stormed to victory in the Hungarian Grand Prix as he begins to mount an outside challenge for the Driver's Championship.
But Brawn still feels Hamilton is adapting to life at Mercedes following his move from McLaren, and believes he is yet to reach his potential.
"When a driver of Lewis' calibre joins a team, there is massive expectation but every driver takes a little time to settle in, to understand the nuances," said Brawn to BBC Sport.
"It has taken a little while but I see great signs, particularly the last few races."
His latest victory means the British driver is now 48 points behind championship leader Sebastian Vettel, as he looks to put pressure on Red Bull's front runner with 225 points up for grabs in the remaining nine races.
Having made a slow start with Mercedes, the 28-year-old has clearly found his form in recent weeks and feels confident with the car at his disposal.
"Hamilton is starting to pick up momentum and move in the right direction," Brawn said.
"So we honestly don't know where the limit is, because we are on a journey with Lewis and we don't know where the limits are."
Hamilton will be back in action during round 11 of the F1 season as the drivers take to Belgium over the 23-25 August following the mid-season break.
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