Update.

Day 1 - cup - Pereira - 6 days (healed, 15 reds)
Day 1 - cardio - Horvat - 3 days
Day 3 - champions - Owens - 6 days (healed, 15 reds)
Day 4 - league- Higuain - 4 days
Day 6 - league - Sorna - 6 days
Day 6 - league - Pereira - 3 days
Day 6 - cardio - Turner - 4 days (healed, 5 reds)
Day 8 - practice - Vidal - 5 days (healed, 14 reds)
Day 9 - friendly - Pogba - 4 days

Click image for larger version.  Name: inj8.jpg  Views: 4  Size: 23.0 KB  ID: 9315

please pay attention to the average of days: no more 1-2 days injuries.
It means that for every injuriy you have to spend the maximum in terms of red boosters.

For the statistics, when Pogba got injuried I had just 1 red bag.