Kai Havertz had to be substituted with an apparent knee injury while playing for Germany.The Arsenal striker left the pitch just 30 minutes into his country’s Nations League clash with the Netherlands in Amsterdam.Havertz was replaced by Younes EbnoutalibGettyEarlier in the first half, Havertz had been on the receiving end of a nasty-looking challenge from Crystal Palace‘s Quinten Timber, the brother of his Arsenal teammate Jurrien Timber.As Havertz played a pass on the volley first time, Timber’s studs connected with the Gunners forward’s right knee, prompting him to go down on the ground.Havertz tried to play on after receiving treatment but was ultimately unable to continue.Despite the blow of losing Havertz, though, Germany did strike first against their rivals, Felix Nmecha opening the scoring moments after his colleague had had to leave the pitch.Arsenal boss Mikel Arteta will be keeping everything crossed he won’t be without one of his key men for any great length of time.Havertz has started all of the Gunners’ Premier League matches so far this season, scoring two goals.Earlier in the game there was a blow for another Premier League star with Netherlands and Sunderland forward Brian Brobbey also hobbling off.Germany are playing their first game under new boss Jurgen Klopp.View Tweet: https://t.co/4QMZIm7qdlThis is a developing story and is being updated.For the latest updates, breaking news alerts, and comprehensive analysis, refresh this page or follow our real-time news coverage by watching and listening to talkSPORT live.For broader context, explore related coverage on our homepage for the top trending stories. For the latest talkSPORT videos, download the app.talkSPORT cares about getting it right, not just getting it first and because this is a developing situation, details will change. We will be updating this page constantly with verified info, expert takes, and official statements.Stay tuned for further developments as this story continues to break.