Mauricio Pochettino tells Chelsea: Failure to capitalize on victory spells trouble

The Blues coach praised the impact of match-winning substitute Mykhailo Mudryk. 

The Ukrainian came off the bench to score with a superb individual goal to make it 3-1 in the 76th minute, pelting on to the ball at full tilt before tricking his way beyond a dumbfounded Fabian Schar and nipping round Martin Dubravka to finish.

"It was a very good goal and that is what we expect from a player from the bench - impact," said Pochettino. "Then it is about competing with different players in his position. Then he will deserve to (start)."

The goal helped settle a finely balanced game, the kind that has so often slipped away from Chelsea under Pochettino.

They had already allowed an advantage to get away from them on the stroke of half-time.

Leading 1-0, Chelsea made two errors to hand Newcastle a way back into the match. First, the otherwise impressive Malo Gusto was caught trying to juggle the ball in midfield, then Trevoh Chalobah rushed up from central defence to assist and left a gaping hole into which Alexander Isak darted and rifled the visitors level.

Earlier, Nicolas Jackson had given his team a deserved sixth-minute lead, applying the deftest touch with his heel to Cole Palmer's strike, getting just enough contact to divert it out of the reach of Dubravka and into the bottom corner.

Palmer, brilliant again on the right of a forward three, scored a 13th goal of his debut Chelsea season early in the second half.

Enzo Fernandez spotted the Blues' top-scorer in space and gave the ball to him with his back to goal. With his first touch Palmer turned and with his second he lashed a shot inside the near post for 2-1.

Then came Mudryk's decisive moment of magic and, although Jacob Ramsey gave Chelsea a scare with a cracking late drive from range, Pochettino's young side clung on.

"We need to understand that we are Chelsea," said Pochettino. "We are in a project that is completely different (to the past). Some people might be confused. When people don't want to listen, it's difficult.

"But we are trying to explain we are a different Chelsea, we are building something different. It's going to be tough.

"We need to keep believing, even when it's tough circumstances. We played (the Carabao Cup) final, 120 minutes, then after three days we play the FA Cup and we play Brentford. In six days we played three very tough games, nearly with the same team.

"It was really tough. If that means we are a disaster, OK. The most important thing is it's not affecting the team. They know what they need to do and we keep believing.

"The win today is important for our fans to be a little bit more calm. But I think if we don't win our next game, it's going to be again a problem. That is Chelsea."

Newcastle boss Eddie Howe reflected on a match that had been there for the taking before Mudryk's late strike.

"I thought it was a game in the balance and an open game," he said. "The game got away from us with the goals we conceded which were really poor from our perspective - they were self-induced.

"Wherever you play you have to pride yourself on being tight and I don't think Chelsea had an abundance of chances tonight.

"But the way the goals came from our perspective is hugely frustrating as we know the details have to get better."

READ MORE: Chelsea hold on to edge Newcastle in five goal thriller at Stamford Bridge