A male fan was on Sunday night stable and responsive after being taken to hospital following a suspected heart attack during the first half.
Fans in the East Stand alerted players to the incident in the 40th minute and Sergio Reguilon and Dier were particularly quick to react, with the Spaniard alerting referee Andre Marriner and Dier racing over to the dugouts to call for a defibrillator.
“Of course I’m proud of all the players,” Dier told Standard Sport. “The reaction was perfect from everyone involved.
“There was a medical professional there who was with the fan really quickly and all the medical staff were there so quickly. They deserve all the credit.
“You never want to see those things happen but a football stadium is one of the safest places for something like that to happen as the response is so quick and there are medical professionals all over the stadium.
“When we walked over to the corner, all the fans in that section were making it clear to us and the referee that something was happening. We could see someone giving someone else CPR. We could see quite clearly what was going on. Then one of the Newcastle players motioned for a defibrillator to their bench and I ran over to make it clear.”
Newcastle fan and A&E doctor Tom Pritchard was first on the scene to give CPR, while the Magpies’ club doctor, Paul Catterson, was also in attendance.
Dr Pritchard told the BBC: “It wasn’t just me. [There was] a friend helping out, another doctor, and the other two doctors there. St John [Ambulance service] were brilliant and the club doctor came over to lend a hand. When I was walking back to my seat and 10,000 fans in the Gallowgate [End] were chanting ‘hero’ at me, that was one of the best moments of my life.”
The match was paused for 20 minutes while the fan received attention.