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As Newcastle completed a smash and grab 2-0 victory over Arsenal in the Carabao Cup first-leg semi-final at the Emirates Stadium in London on Tuesday, Magpies striker Alexander Isak says there’s still much work ahead.

Isak opened the scoring eight minutes before the interval and then turned provider for Anthony Gordon in the 51st minute as Newcastle secured the win in a contest they failed to dominate.

In fact, Arsenal had 23 shots to just the seven of the visitors. Still credit has to be given to the Newcastle defence with keeper Martin Dúbravka front and centre in keeping a clean scoresheet.

Arsenal also enjoyed the lions’ share of possession with 70% of the ball. The Gunners also reeled off 571 passes to the 258 of Newcastle.

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”It's massive. it's a great result but it's only the first half," said Isak.

It was also Newcastle’s seventh win in a row across all competitions as they find themselves up to fifth on the Premier League table.

Isak added that if Newcastle do not go on to reach the final, with the second-leg semi scheduled for February 5, it would be a massive disappointment.

"If we don't go through then this has no meaning.”

Meanwhile, Arsenal coach Mikel Arteta was left frustrated with the result.

"That was the biggest difference in the game. In every other aspect, we were the better team," said Arteta on his side's wasted chances.

"I have full belief. I have seen my team playing against them. I believe we can do it!"