This is an unforeseeable event that can happen to any team, which is why most coaches prefer not to use all of their best players in preseason matches to avoid injuring more than one of them during play. This is an important reason why teams should have more than one player for each position, and substitutes should be able to fill the hole left by an injured player.
Nkunku injures too much and that is just the problem he has always had in his soccer career. Chelsea fans were already happy that they have confidence in Nkunku and what he will do for them this season since he was already scoring from the preseason, it is very disappointing that he will miss a lot of games including the very first Chelsea game of the season which is against Liverpool.
This was a problem for Arsenal last season,
But this season, Arteta looks to have made sure that he will have options for when the challenges come. He brought players to the club that can play in different roles when needed.
I don't really witness too much of that you know, last I did witnessed and observed was during th final training to the Fifa World Cup where he was sent back home immediately he got knocked due to hardly tackled from one of his teammates.
Chelsea should focus on getting important players and not all this younger names who has nothing to show a fan boasted that Chelsea will definitely end up winning the Premier League. They have a lot to achieve but if the right signings are brought in they would do well but struggle winng the Premier League or another.