The Brazilian was a major doubt going into the game after losing three kilos in three days, but came on at half-time to score and turn the game around.
On Wednesday, the 24-year-old was taken off during Liverpool’s draw with Bournemouth after feeling sick at half-time.
Despite Coutinho revealing he felt better following the game, he was still a major doubt heading into the weekend’s fixture against the Potters.
Speaking on Friday, Klopp said: “We will have to see about Coutinho. We will give him all the time. He will be really close.”
However, one hour before kick-off on Saturday and Coutinho was named Reds’ substitute bench.
Liverpool went into the break 1-0 down after Jonathan Walters put the home side ahead.
Klopp then made a double switch at half-time bringing on Brazilian pairing Roberto Firmino and Coutinho.
The latter equalised on 70 minutes before the former got the winner two minutes later.
Speaking after the game, Klopp revealed how he saved Coutinho in order to get the best out of the Brazilian.
Despite Coutinho insisting he was fine prior to the game, the German’s mind was made up.
He said: “Phil lost three kilos in the last three days. For most of us that would be good news, but for Phil, sorry.
“He came [to me] this morning in the hotel and said ‘I’m fine’. But we knew he would have low energy levels.
“He was fit enough for about 30 minutes.”