Arsenal announced today, Wednesday, that defender Jurien Timber has suffered a tear in the anterior cruciate ligament of his right knee. Timber, who recently joined Arsenal from Ajax during the current transfer window, left the match against Nottingham Forest in the Premier League opener last Saturday after five minutes into the second half due to an injury sustained at the end of the first half. Arsenal stated in a message on their website: "After undergoing tests by specialist consultants since last Saturday, we confirm that Jurien Timber has suffered a tear in the anterior cruciate ligament of his right knee,” and he will undergo surgery in the coming days and will be out for a while. This represents a significant blow for Arsenal manager Mikel Arteta, as the 22-year-old defender played a key role in the team's victory in the Community Shield after winning on penalties against Premier League champions Manchester City.