Who is Verstappen’s main title rival – Leclerc or Perez?

Charles Leclerc remains a bigger threat than Sergio Perez to Max Verstappen's world championship title defence, despite Ferrari's reliability woes, according to Sky Sports F1's Naomi Schiff.

Verstappen struggled to match the pace of Leclerc and his Red Bull team-mate Perez in practice and qualifying at the Azerbaijan GP, but was in a league of his own on Sunday as he sealed a fourth win in five races.

While a Ferrari double DNF caused by engine failures prevented a full-race comparison of Verstappen and Leclerc's speed, the Dutchman appeared to have the edge in the early stages, before charging clear of Perez to seal a comfortable one-two.

The victory extended Verstappen's world championship lead to 21 points, while Perez leapfrogged Leclerc for second, with a 13-point gap separating them ahead of the Canadian GP, which begins on Friday, live on Sky Sports.

"I think it's probably still Charles [who is the biggest threat]," Schiff said after the Ferrari driver failed to convert pole to victory for a fourth successive race.

"Clearly he's really quick, he's been outqualifying them quite a lot.

"It's just a question of whether Ferrari can sort out their technical issues. I think he's going to be really disappointed with what's gone on. We don't want to see a championship being decided by that.

"But then the other question is whether Red Bull will let their drivers race?"

Perez arrived in Baku full of confidence after outpacing Verstappen to win in Monaco and sealing a two-year contract extension with the team.

The Mexican's speed - and the narrow 15-point gap that separated him and his team-mate going into the weekend - led to plenty of speculation as to who the team would favour in terms of strategy, but Verstappen's clear