Kai Havertz was forced off during the first half of Germany’s Nations League clash against the Netherlands, handing Arsenal an early injury concern during the international break.Havertz was tasked with leading the line in Jurgen Klopp’s first match as Germany’s new head coach.The 27-year-old lasted just 30 minutes of the fixture with the forward having gone down appearing to signal an issue with his hamstring.Havertz’s issue emerged just minutes after he had fallen victim to a poor challenge from Quinten Timber, the brother of Havertz’s Arsenal team-mate Jurrien.Timber had arrived late for a challenge and caught Havertz high on his knee, with the German attacker immediately falling to the pitch.Havertz appeared fortunate that the late challenge had only seen Timber’s boot brush his knee, rather than make significant contact. Kai Havertz went down with an apparent hamstring injury during Germany’s match with the Netherlands The Arsenal star limped off with the issue after the half hour mark of the Nations League clashHavertz ultimately left the field with a hamstring issue later in the half, with Younes Ebnoutalib coming on to make his international debut as his replacement.While Havertz walked off the pitch, the injury will be of concern to Arsenal boss Mikel Arteta.Havertz has been an ever-present for the Gunners’ starting line-up in their first five Premier League matches of the campaign, with Arteta backing him to lead their attack.The extended international break will give Havertz time to recover before Arsenal’s next Premier League match against Leeds on October 10.There was another injury issue for a Premier League side, with Sunderland forward Brian Brobbey also being forced off with a hamstring problem.Brobbey, who scored a hat-trick against Man City last weekend, went down for the Netherlands during a Germany attack in the first half.Despite appeals from the Dutch to kick the ball out, Germany continued to attack and ultimately opened the scoring through Felix Nmecha.Dutch players clashed with their German opponents after being angered over the nature of the goal, with Brobbey also needing to be replaced due to his injury.