The England international fired in a 30-yard free-kick to make the score 4-1 in his side's favour.
"It was one of my best, I hit one a few years ago against Ipswich in the FA Cup, but to do it against Tottenham at Wembley makes it one of my favourites," he told the club's official website.
"I was just pleased my goal finished off the game completely. At 3-1 if they got another one they could give us a dodgy last few minutes."
The Blues went on to win the tie 5-1.