FILE PHOTO: Soccer Football - Premier League - Arsenal v Nottingham Forest - Emirates Stadium, London, Britain - August 12, 2023 Arsenal's Jurrien Timber reacts after sustaining an injury REUTERS/David Klein EDITORIAL USE ONLY.  No use with unauthorized audio, video, data, fixture lists, club/league logos or 'live' services.  Online in-match use limited to 75 images, no video emulation.  No use in betting, games or single club /league/player publications.   Please contact your account representative for further details.  / File Photo

Why are so many top football stars suffering ACL knee injuries?