- Harry Kane scores 37th goal of 2017 to break Alan Shearer's record.
- Kane nets second to eclipse Lionel Messi as highest scorer in Europe this year.
- Dele Alli curls home eighth goal of the season after the break.
- Son Heung-Min strokes home from Alli's pass.
- Sofiane Boufal slams home after Hugo Lloris error.
- Chipped finish sees Kane complete hat-trick.
- Dusan Tadic nets after another Lloris calamity.
- Tottenham go fourth temporarily after they beat Southampton.
Well that brings an end to our live blog from this game at Wembley. Harry Kan grabs the headline once again with a breath-taking display.
We have seven more games to get your teeth into this Boxing Day, so head over to our live blog here for coverage of the six 3pm kick-offs, before Liverpool face Swansea at 5:30pm. I look forward to seeing you on the other wise.
Full time: Tottenham 5-2 Southampton
A day that will belong to Harry Kane. He scores his eighth hat-trick of 2017 and beats Alan Shearer's 22-year Premier League record for most goals in a calendar year. Lionel Messi is also left for dust this year. Dele Alli and Son Heung-Min also got in on the act for Tottenham.
Southampton struck twice late on but by then they were out of sight and had it not been for Hugo Lloris then they might have nothing to show for this shambolic display. Really poor from Mauricio Pellegrino's side, who are heading for a relegation battle if this form continues.
Into three added minutes at Wembley. Time for more goals?
GOAL! Tottenham 5-2 Southampton (Dusan Tadic)
A second blotch on this afternoon for Spurs as Hugo Lloris again makes an error. The Frenchman palms out a corner unconvincingly and he falls to Tadic who knocks it back towards goal and Lloris can only tip the ball into the corner.
Shane Long is destined to end his long run without a goal but Jan Vertonghen sticks out a leg and turns the ball over his own bar from three yards out. Brilliant defending and Long remains without his goal. Kane has scored 50 since his last one.
GOAL! Tottenham 5-1 Southampton (Harry Kane)
Make that 39 for 2017, 96 in the Premier League for Tottenham and 56 in all competitions for Harry Kane, not to mention an eighth treble of the year. Kane is played through on goal, allows Yoshida to go to ground before chipping the ball over Forster. Delightful deft finish.
GOAL! Tottenham 4-1 Southampton (Sofiane Boufal)
While we're talking about overrated goalkeepers, Hugo Lloris is right up there. The Frenchman makes a gaff here as he allows Boufal's shot to creep underneath him and beat him at the near post.
Son Heung-Min has to be one of the most improved Premier League players around.
Harry Kane steers home his 55th goal of the year.
Harry Kane inches away from that hat-trick volleying wide on the run from Eriksen. Still 30 minutes left to get it.
GOAL! Tottenham 4-0 Southampton (Son Heung-Min)
Southampton are crumbling like an overdone Christmas pudding here. Nathan Redmond gives the ball away in the Tottenham final third and Alli runs forwards and feeds Son who slots into the corner.
GOAL! Tottenham 3-0 Southampton (Dele Alli)
Just as Southampton threaten to get back into the game Spurs put them out of sight. Alli arcs a shot from outside the box beyond Forster and into the far corner. Just his second league goal in 16 games, and a much-needed one.
OFF THE BAR! Better from Southampton and he almost halve the advantage as Lemina cracks one from 20 yards which beats Lloris and smashes against the woodwork.
Shane Long has gone 33 games without a goal for club and country and when he goes through on goal he looks no closer to breaking that run. Eric Dier's mistake lets him in but the Irishman slips as he shoots, kicking the ball into his standing leg and Lloris makes an easy save.
Players out for the second half at Wembley. Teddy Sheringham's 95 goals for Tottenham in the Premier League is the next landmark for Harry Kane, and he needs two to equal that.
Second period under way.
Half-time: Tottenham 2-0 Southampton
A half which has belonged to Harry Kane. Two more goals for the England man takes his 2017 tally to 55 in all competitions and 37 in the Premier League, seeing him eclipse Lionel Messi and Alan Shearer's respective feats in the process.
Southampton have not offered anything going forward and bar a wayward Danny Rose header back to Hugo Lloris which hit the post Spurs have been untroubled. I'd be worried for Saints in the second half.
Son Heung-Min looks destined to make it three but is taken out by Stephens. Doesn't look like the defender gets the ball and with Graham Scott behind play he waves away appeals for a penalty. That should have been Kane's chance for a first half hat-trick.
GOAL! Tottenham 2-0 Southampton (Harry Kane)
The answer is emphatically yes. Harry Kane gets his 55th goal of the season and goes one clear of Lionel Messi for goals in 2017. A fine move involving Alli and Son sees the ball rolled across to Kane to converts from about three yards. Saints have been so bad it has been embarrassing.
Looks like many have lost sight of why we are here this afternoon.
So Harry Kane has ticked one record off this afternoon, and that goal also took him level on goals with Lionel Messi in 2017 with 54.
He now has just under an hour to go in this game to go above the Argentine and become the highest scorer in Europe this year. Just underlines what a year it has been for the 24-year-old.
Harry Kane's name up in lights at Wembley.
The moment Harry Kane made history at Wembley.
Eriksen fires a cross across the six-yard area but Kane nor Son can get around to it in time to make contact. Southampton desperately poor here.
A message of congratulations from Alan Shearer upon his 22-year record being beaten.