Well you guys should read this I think:
https://www.nationalgeographic.com/science/2020/02/here-is-what-coronavirus-does-to-the-body/
I'm Vietnamese and we have been fighting this from the very start. You can use google translate to read this as well:
https://news.zing.vn/hinh-anh-phoi-cua-benh-nhan-bi-virus-corona-pha-huy-post1053172.html
https://dantri.com.vn/suc-khoe/viru...tren-co-the-nhu-the-nao-20200217135407112.htm
As this virus attacks mainly the infected's lungs, even if you got recovered from the virus your lungs already got damaged by then and it'd take time to health them back. That why I said most of the patients who recovered still have some lung damage with them.
Imo this lung damage seems pretty similar with one caused by smoking. Of course it can be fully recovered over time, like when you stop smoking but usually this process would take years until your lungs get back to top conditions, if it would. And for a professional footballer or athlete, their careers should be dead by then I think.
Of course I'm no doctor so please correct me if I'm wrong.
P/S: I forgot one thing that only around 20 % of those got infected would have serious lung damages. That's why I said "sometime very seriously". Only in such cases that your lungs would take years to fully recover I think. Sorry if my post caused any misunderstanding that all would.