The 21-year-old winger gave Chelsea a 1-0 lead over Arsenal in the fifth minute at Wembley Stadium on Saturday, slotting in from close range after being set up by Olivier Giroud's flick.
The match was slow to get off the blocks as both sides took their time to get a hold of things.
Arsenal defeated Manchester City by 2-0 in the semi-final clash of the FA Cup to book their spot in the final here on Sunday.
Frank Lampard stopped short of being critical of the VAR decisions that have gone Manchester United's way in recent matches.
Manchester United will take on Chelsea in the first semi-final on July 18 while Manchester City will locks horns against Arsenal on July 19.
The cup final was due to be played in May but the competition was suspended as sport was shut down in England in March to prevent COVID-19 spreading.
Leicester take on Chelsea, Newcastle face holders Manchester City, Sheffield United play Arsenal and Norwich meet Manchester United.
Eric Dier confronted a fan due to a family insult following Tottenham's loss against Norwich City in the FA Cup.
Chelsea defender Cahill is adamant about lifting the trophy at Wembley would be the equal of Tottenham's top four finish.
No FA action against Liverpool forward Roberto Firmino over spat with Everton defender Mason Holgate
Liverpool forward Firmino will face no disciplinary action following his clash with Everton's Holgate in the FA Cup.
Wigan announced a full investigation into crowd disturbances that marred the club's dramatic FA Cup victory over Manchester City.
Guardiola's quest to win an unprecedented quadruple with Manchester City came to a stunning end when they fell to a 1-0 defeat at Wigan.
Defeat at the hands of Newcastle at the weekend left Jose Mourinho's men second in the Premier League but just four points clear of Tottenham in fifth as the race for the top four heats up.
Leeds took a ninth-minute lead in the third-round tie when Gaetano Berardi's deflected long-range shot found the net.
Wenger believes his team will overcome their defensive injury crisis by beating Double hopefuls Chelsea in FA Cup final.