A brace from Richarlison as well as goals from Destiny Udogie and Son Heung-min, before a stoppage-time consolation goal from Joelinton, saw Tottenham thump Newcastle 4-1.
It ended a five-game winless run for Spurs in emphatic fashion and narrowed the gap to fourth-placed Manchester City to three points.
It was nothing new Tottenham taking the lead, having done so in 10 matches in a row now, but getting the second goal had been more difficult of late.
Newcastle threatened through Joelinton before the second goal arrived for Spurs in the 38th minute and it was all about Richarlison.
He won possession back on the halfway line before Tottenham moved the ball quickly out to Son, who again got the better of former team-mate Kieran Trippier to tee up the Tottenham number nine to sweep home.
It was only Richarlison’s sixth goal since his £60m transfer from Everton last year, but crucially gave Postecoglou’s team a two-goal cushion and it could have been 3-0 moments later.
Pape Sarr robbed Joelinton of possession and passed into Johnson, who fizzed an effort from 22 yards that skimmed the outside of the far post.
Newcastle came out with improved intent after the break, but their spirit was broken on the hour mark.
Pedro Porro was the architect with a wonderful crossfield pass into Richarlison, who got enough of a touch to bring the ball into his path and slide under Martin Dubravka for his second goal.
The shackles were firmly off now and Johnson side-footed against the inside of the post before Son flashed a volley across goal, which sparked a change by Howe with Callum Wilson introduced.
There was still time for more from Postecoglou’s men when Son was sent through and despite a heavy touch, he got beyond Dubravka and won a spot-kick which he converted.
Newcastle had the final say on proceedings when Joelinton slotted home in the first minute of stoppage time after Wilson’s assist, but Spurs returned to winning ways in style.
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