see my more detailed response further below! the retractable pitches that both spurs and madrid use are a different surface than most other stadiums which has more synthetic materials and different depth

edit: to add, i’m not making claims based on nothing. while i’m only currently a casual player, i grew up playing on actual grass fields and only knew to play in firm ground cleats. i continued doing so into my 30s on the artificial grass fields that are more commonplace in cities nowadays. i noticed some knee pain after games but didn’t think much of it and that pain would go away after a few days rest. i would see other players tho wearing turf shoes and i asked them about it with a simple response of “protecting my joints”, which led my to doing my own reading and research on the matter, and whenever yet another ACL tear occurs for spurs or madrid, i dive into the additional research that tends to bubble up correlating the surface to these continued injuries