Chelsea, who face rivals Arsenal in the Aug. 1 showpiece, had lost to United three times this season but dominated the match and took control with goals either side of halftime from Olivier Giroud and Mason Mount.

Chelsea manager Frank Lampard was delighted with the discipline of his team, who ended United's 19-game unbeaten run. 

"People ask a lot at this time of the year about mentality and character and our team was full of it today," he told the BBC after the match at an empty Wembley, the national stadium's gates locked because of the COVID-19 pandemic.

United were forced into a change at 0-0 late in the first half when Eric Bailly was carried off after clashing heads with fellow defender Maguire, United manager Ole Gunnar Solskjaer bringing on Anthony Martial to create more attacking threat.

But it was Chelsea who took the lead 11 minutes into first-half stoppage time when Giroud flicked a cross by captain Cesar Azpilicueta at De Gea who failed to get enough of a hand on the ball to stop it spinning over the line.

Chelsea doubled the lead a minute after the restart when Mason Mount pounced on a poor pass by Brandon Williams to shoot from the edge of the box. It looked like De Gea would make a comfortable save but he could only steer the ball into the net.