Carlos Sainz will team up with Williams early to drive their FW46 car in next month's post-season test in Abu Dhabi, the constructor has announced.

Sainz agreed to join Williams in July after losing his Ferrari seat to seven-time world champion Lewis Hamilton, who stunned the Formula One world by exercising a break clause in his contract with Mercedes earlier this year.

The Spaniard is currently fifth in the drivers' championship standings, with his two race wins for the year coming in Australia and Mexico.

On Friday, Williams confirmed he will join the team for post-season testing on December 10, two days after the campaign ends with the Abu Dhabi Grand Prix.

"This early opportunity will allow both Carlos and Williams to begin building their relationship," a team statement read.

"The test session will provide a valuable chance for Carlos to begin integrating into his new team environment, and he will drive the FW46 for the first time."

Hamilton is not expected to take part in Ferrari's post-season tests, due to his ongoing commitments with Mercedes.