Dybala struck twice in the first half for Juve, who were without the suspended Cristiano Ronaldo.

The Argentine striker, 24, completed his treble on 69 minutes to make it nine straight wins in all competitions.

That took the Italian champions past their previous best start of eight wins in 1930-31.

Juve won their first nine games as they won Serie A in 2005-06 but were subsequently stripped of the title for match-fixing.

Having won 2-0 at Valencia in their opening Group H game, they are now two points clear of Manchester United, who they face in their next two group games.

Dybala steps out of Ronaldo's shadow

Juventus have won the Italian league for the past seven seasons, but Champions League success has just eluded them, beaten in the final in 2015 and 2017.

They lured Ronaldo from Real Madrid in the summer hoping to become European champions for the first time since 1996 and they have looked even stronger with the Portuguese forward on board.

But they also look impressive without him, with Dybala showing that Massimiliano Allegri's men will not necessarily have to rely on the Portuguese to lead them to European glory this season.

Their winning start never came under serious threat on Tuesday.

Dybala opened the scoring inside five minutes, scoring with a fine first-time volley after being picked out by Leonardo Bonucci's pinpoint diagonal ball from just inside the Young Boys half.

He then missed a far easier chance from Federico Bernardeschi's square-ball, sidefooting straight at David von Ballmoos, but he made no mistake on 33 minutes, converting the rebound after Blaise Matuidi's 20-yard strike was parried by Von Ballmoos.

The Argentine hit a post from Bernardeschi's lay-off just after half-time before having a strong penalty appeal turned down, but he was not to be denied his hat-trick as he tapped in from close range after Juan Cuadrado turned a cross back across goal.

Young Boys' only effort on target was a shot that was deflected wide on 61 minutes, and they had Mohamed Ali Camara sent off for a second bookable offence, and if Juve look this comfortable without Ronaldo, it bodes well for their bid to land a third European crown.

Cristiano Ronaldo was in the stands in Turin as he served a one-match suspension

Another Juve shut-out - match stats

• Juventus are unbeaten in their past 19 home games in the Champions League group stage (won 11, drawn eight), while keeping 12 clean sheets in this run.
• Excluding qualifiers, this is the first time Young Boys have lost back-to-back games in European competition without scoring since September 2010 (0-2 v Club Brugge and 0-3 v Stuttgart in the Uefa Cup/Europa League).
• Since the start of 2014-15, Juve have kept 23 clean sheets in the Champions League - only Atletico Madrid have kept more in the competition during this period (24).
• Young Boys have not kept a clean sheet in any of their previous 12 games in European competition, with their last one coming back in August 2017 (2-0 v Dynamo Kiev in a Champions League qualifier).

What's next?

Juventus visit Udinese in Serie A on Sunday (17:00 BST) while Young Boys host Lucerne in the Swiss Super League (18:00).

Young Boys return to Champions League action at home to Valencia on Tuesday, 23 October (17:55 BST) before Juve visit Ronaldo's former club Manchester United (20:00).