Reliability, a fast, resurging Ferrari... factors that could hamper Verstappen's title bid

Max Verstappen raced to victory at Sunday's Canadian Grand Prix to extend his championship lead to 46 points.

Here, the PA news agency looks at the factors that might stand in the way of Verstappen charging his second title in succession.

Is Verstappen the best driver in the world right now?

With six victories from nine and a commanding advantage in the championship fight, Verstappen is the grid's in-form driver.

Fresh from dominating on the streets of Baku a week ago, the Dutchman produced an equally impressive display at Montreal's Circuit Gilles Villeneuve. Verstappen put his Red Bull on pole in the wet, and after beating Fernando Alonso to the opening bend, his victory - despite a late challenge from Ferrari's Carlos Sainz - never appeared in danger.

He is 46 points clear of teammate Sergio Perez as we approach the midway stage of the season. Red Bull, meanwhile, has won the last six races.

A fast and furious fight for the win! ?? #CanadianGP ???? pic.twitter.com/vN1WveHA0E

What has happened to Leclerc?

Leclerc won two of the opening three rounds to lead Verstappen by 46 points. But the Monegasque has endured a torrid run since - and largely through no fault of his own.

Leclerc's retirements in Spain (May 22) and Azerbaijan (June 12) with engine failures were sandwiched by a strategy faux pas from his Ferrari team in Monaco (May 29), which denied him a probable win. Sunday's Canadian GP was a case of damage limitation after he started at the back following engine penalties.

He drove well to finish fifth, but now trails Verstappen by 49 points - the equivalent of two wins.

Can Leclerc haul himself back into the title fight?

Despite Leclerc's grid penalty, Ferrari will take some confidence from their speed in Montreal.

Sainz