Thomas Tuchel hit out at Newcastle defender Jamaal Lascelles’ “reckless” tackle that left Tammy Abraham with an ankle injury.
Lascelles avoided any punishment from referee Peter Bankes despite a scissor tackle that upended the Chelsea striker in the Newcastle area.
Olivier Giroud and Timo Werner scored as Chelsea ran out 2-0 winners to climb into the Premier League’s top four for the first time since December.
But new boss Tuchel was left frustrated by the tackle that ended Abraham’s night, revealing he was barred from discussing it with referee Bankes at half-time.
“There’s no update yet on Tammy, but we needed to take him off after a hard tackle,” said Tuchel. “So, we are worried, but there’s no news of him.
“My assistant tried to show him (Bankes) the tackle on the iPad and he told us he was not allowed to talk to us. It was the tackle, but we didn’t know he wasn’t allowed to watch. So okay, we didn’t realise that.
“He (Lascelles) played the ball, yes, but for me, it’s too much of a risk to an injury to the opponent. And because of that for me, it’s a foul.
“It’s reckless, but okay it was not like us to criticise, just to discuss with the officials.”
Chelsea’s jump to fourth pushed defending champions Liverpool down to sixth, with new Blues boss Tuchel claiming his fourth straight league victory in west London.
Tuchel insisted the hard work remains still ahead for Chelsea, despite the Blues climbing back into the top four.
Chelsea will travel to face Southampton on Saturday, with Tuchel revealing he will hand his players Tuesday and Wednesday off in a bid to aid recovery amid the hectic fixture list.