With credit to [MENTION=19656]LordLichtenstein[/MENTION] for the original idea, I decided to do summarize the amount of minutes our squad has played for club and respective country to see the overall fatigue for each player.
If anyone's interested, I have the percentages for just club games as well.
Source for minutes played is Transfermarkt.com.
100-86% - 85-71% - 70-56% - 55-41% - 40-0%
24 games played (12 LL, 4 CL, 1 CdR, 1 SC, 6 Int.)
79% - Suárez
79% - Busquets
76% - Rakitic
75% - ter Stegen
72% - Alba
71% - Piqué
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67% - Coutinho
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54% - Sergi Roberto
53% - Arthur
51% - Dembélé
49% - Messi
42% - Lenglet
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34% - Umtiti
32% - Vidal
30% - Semedo
29% - Cillessen
14% - Rafinha
13% - Vermaelen
11% - Munir
8% - Malcom
4% - Aleña
4% - Denis
2% - Samper
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Percentage of individual playing time to the point when injury occured:
81 % - Umtiti
77 % - Coutinho
76 % - Rakitic
73 % - Messi