Harry Kane sent Tottenham into the FA Cup fourth round with his 265th goal for the club enough to see off League One Portsmouth.
Kane moved one behind Spurs’ all-time top scorer Jimmy Greaves after bending a wonderful effort into the corner from the edge of the box at the start of the second half.
Tottenham struggled throughout to break down the managerless visitors, who had sacked boss Danny Cowley on Monday following nine winless league games, with a much-changed team from their 4-0 victory at Crystal Palace.
Both Kane and Heung-Min Son kept their places though as Spurs laboured to their 1-0 win, capping a positive week for Antonio Conte ahead of the north London derby with Arsenal next Sunday.