The 2020 Formula 1 season could be Red Bull's last chance to keep hold of Max Verstappen, according to David Coulthard.

Although Verstappen's stock continues to rise as a result of spectacular performances, Red Bull have struggled to give the Dutchman a consistently quick car and he is yet to properly feature in a battle for title glory in three full seasons with the team.

Verstappen's father, Jos, has suggested that a change of team will be sought if Red Bull cannot deliver a good enough car in 2020, when the 22-year-old's contract is set to expire.

And with Sebastian Vettel and Lewis Hamilton also seeing their contracts expire at the same time, as well as Hamilton being linked to a sensational witch to Ferrari, Verstappen could be a major player in the driver market.

"Max is one of the best drivers, but he has been limited somewhat by the car," Coulthard told De Telegraaf.

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"It would be great for Formula 1 if the cars driven by Verstappen, Hamilton and Leclerc are all approximately equal – then we will see an exciting fight.

"But in the last six years, Mercedes has had the best car. I would really like to see Max stay at Red Bull, but I understand if he would want to leave if Red Bull and Honda cannot fight for the title in 2020.

"It's going to be a very important year for them."