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, live on 
Tottenham failed to have a shot on target in the first half with Portsmouth going closest to taking a stunning lead
 Reeco Hackett-Fairchild adjusted his body in the box to swivel and sweep an overhead kick at goal which had to be pushed away by Fraser Forster
Kane nearly turned the ball home from a corner, while Son whipped an effort narrowly wide, but Spurs were thoroughly frustrated by the resilient visitors, roared on by almost 9,000 supporters
They were still not silenced despite Kane breaking the deadlock five minutes after the break amid a fast Tottenham start which saw Emerson Royal's headed effort come back off a post
 Kane exchanged passes with Ryan Sessegnon on the edge of the box before bending a perfect effort into the corner for his third goal of the week
Tottenham dominated the second period, seeing Son blast over before Oliver Skipp fired off-target from the centre of the box with a clear view of goal, but it mattered little as Spurs went through
 "I think we have to compliment Portsmouth because they played a good game and made it a tough game for us
 It was not easy to find a way to score
"We had the possession and had the game under control so we are happy
 Maybe we could have scored earlier but we couldn't find a goal
 After we scored the game was different and it was much better for us
"We had to stretch them to find a way to score [after half-time]
 We tried to move players, get Oliver Skipp into the box, drop Harry Kane [into space] to find a solution and we found it immediately
"We have to take care of him because he's our best player and he's the captain of England
 We have tough games in front of us and Harry is important for us
""I'm really pleased with them, we limited a top side and made a world-class player score a world-class goal
"Our shape was good, we had good energy and offered a threat early in the game
 We tired, which is understandable, but I'm really pleased with the players
"Tottenham took the game away from Palace in 23 minutes the other night, they can do that to you
 But our players limited them to very little
 When Harry Kane has to pull that out of the bag, it says something
"We probably lacked a bit of quality in our final delivery, we nearly got in behind twice, but we were just on the wrong side of those little moments today
"next game is a huge north London derby at home to in the Premier League on Sunday January 15, live on  - kick-off 4
30pm
Antonio Conte's side then face another crucial league game on Thursday January 19, when they travel to , live on  - kick-off 8pm
next outing is at in the Papa Johns Trophy quarter-finals on Tuesday - kick-off 7
45pm
Pompey then face away again on Saturday, this time in League One - kick-off 3pm
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