Newcastle United striker Alexander Isak continued his fine form with another goal to help his side beat injury-hit Tottenham 2-1 in the Premier League on Saturday.

Isak, who scored eight league goals in December, struck again on the stroke of half-time to put Newcastle ahead after they had fallen behind to Dominic Solanke's fourth-minute header.

Solanke's goal had lifted the spirits of the disgruntled home fans on a freezing day in north London, but Tottenham's lead was quickly wiped out when Anthony Gordon equalised.

Tottenham were the better side after the break, with Brennan Johnson hitting the post and James Maddison going close, but Newcastle held on for 10 minutes of stoppage time to secure their fifth successive Premier League win.

Injury-hit Tottenham started with third-choice goalkeeper Brandon Austin making his debut after Fraser Forster was ruled out through illness, while captain Son Heung-min and James Maddison were among the substitutes who missed out through illness.

Spurs manager Ange Postecoglou revealed that injuries and illness had left him with just 11 fit players on Thursday, but despite their problems, Tottenham took the lead after four minutes.

Teenager Lucas Bergvall, making only his second Premier League start, drove forward and fed Pedro Porro, whose cross was met by Solanke with a diving header that gave visiting goalkeeper Martin Dubvravka no chance.

Tottenham's lead lasted just two minutes, however, as they were punished for playing from the back. Bergvall's pass was intercepted by Joelinton's arm and he released Gordon, who curled a left-footed shot past Austin.

Under pressure, Postecoglou vented his anger that the goal had not been disallowed for handball, and the Australian was still seething after the final whistle.

"I'm angry that football wasn't what denied us getting the rewards we deserved today," he told reporters.

Newcastle looked the more clinical side in the first half and Isak should have put them ahead when he shot wide from close range.

But the Swede made amends in the 38th minute when Jacob Murphy's low cross deflected off Spurs defender Radu Dragusin and into the path of Isak.

Tottenham were forced into a defensive reshuffle at half-time as Dragusin, their only fit centre-back, went off ill and was replaced by full-back Sergio Reguilón, with Djed Spence coming in alongside youngster Archie Gray, another player who had been ill all week.

The home side showed plenty of spirit in the second half, however, and Brennan Johnson hit the post from a tight angle after Dubravka had parried Pape Matar Sarr's shot.

Postecoglou threw the dice on the hour mark with a triple substitution - Son, Maddison and Yves Bissouma all coming on.

Maddison curled a delightful effort agonisingly wide, and deep into stoppage time Solanke looked set to equalise but headed Porro's inviting cross straight at Dubravka.

Tottenham were the better side after the break, with Brennan Johnson hitting the post and James Maddison going close, but Newcastle held on for 10 minutes of stoppage time to record their fifth successive Premier League win.