SPURS 1 NEWCASTLE 0
Dubravka, Yedlin, Schär, Lascelles, Lejeune, Ritchie (Barreca 86), Pérez, Longstaff, Hayden, Atsu (Kenedy 82), Rondón
Subs: Clark, Fernandez, Manquillo, Joselu, Woodman
Tottenham manager Mauricio Pochettino likened Son Heung-min's energy levels to "a battery" after his late strike beat Newcastle and moved them second in the Premier League.
The South Korean forward benefitted from a Martin Dubravka error with seven minutes left as his not-so-powerful 20-yard shot went under the Newcastle goalkeeper's body.
"Sonny is like a battery that you have - you work, work, work until the battery is gone," said Pochettino. "He is like this. He gives you everything and when he is exhausted he says he needs to rest. On the pitch he is always 100 per cent in every action."
"He works so hard, he pushes and never gives up - he tries, tries, tries, tries."
Newcastle were well organised and gritty throughout, with Fabian Schar's acrobatic goalline clearance to deny Christian Eriksen in the second half epitomising their spirit.
Rafael Benitez's side had chances of their own, with Salomon Rondon heading against the post with the score at 0-0 but their resistance was broken when substitute Fernando Llorente laid the ball off for Son to score a ninth goal in his past 10 Spurs appearances.
Tottenham's left-sided central defender Jan Vertonghen had 142 touches and delivered 14 crosses from open play as Newcastle sat deep to force Tottenham into wide areas.
Spurs' lack of draws perhaps shows they refuse to settle and that has certainly been the case in recent weeks with late goals earning wins against Fulham, Watford and now Newcastle.
Spurs, with help from Dubravka, ultimately found an answer against a side who sat deep in a 5-4-1 formation and threatened in pockets on the break.
Given Lucas Moura headed wide from close range early on, Erik Lamela headed against the bar and Schar's clearance from Eriksen, few could argue Spurs did not deserve three points.