The Blues have endured a torrid season to date, and with nothing left to play for, they sit tenth in the Premier League standings, having won just one of their last seven games in all competitions.
Their most recent loss, a 3-0 defeat to Manchester City, brought about widespread criticism, with defender Gary Cahill himself even admitting his fellow players “should have more pride on the pitch” and "at least run around and try to get close to people", according to Sky News.
A trophyless season means many of Chelsea’s international starts will be eyeing a successful continental championship in June, and when asked if he feels this is a distraction, Hiddink told the Daily Mirror: "Partly true, but I cannot blame the players for having a lack of attitude.
"Some players might think that, but I cannot look into their minds, in their brains. They might be thinking of the Euros.
"When there is nothing at stake then, with some people, there is a little bit of a lack of the ultimate work."
Chelsea take on Bournemouth in their next League fixture on Saturday.