The £52million signing from RB Leipzig got here off after falling within the penalty space earlier than being substituted for Mykhailo Mudryk within the twenty second minute.
Nkunku is now a doubt to face Liverpool within the opening Premier League match at Stamford Bridge subsequent weekend.
Pochettino gave an replace on Nkunku’s situation after the 1-1 draw with Dortmund in Chicago.
He stated: “The doctors are checking him and I hope it is not a big issue. He fell in the action which was maybe a penalty and he feels something in his knee but we hope it is nothing big.
“We hope he can be back quickly with the team. We need a few days to assess him.”
An Ed Sheeran live performance at Soldier Field over the weekend left the pitch at Soldier Field in poor situation for the match.
Pochettino admitted Chelsea took a threat enjoying on the floor however was cautious to not be overly important of his hosts within the United States, including: “I didn’t see the action but it not about to complaining.
“Always we take some risks because the pitch is not perfect because they are using it for different sports and that is sometimes the risk of the tour, yes.
“But I think it was a bit unlucky in the situation but we cannot complain about the pitch and to blame the pitch for why he suffered the injury. For me it was bad luck.”
Academy striker Mason Burstow’s ninetieth minute equaliser was the least Chelsea deserved after Marius Wolf scored towards the run of play on Wednesday evening.
Chelsea finish pre-season feeling optimistic having gone undefeated throughout all 5 video games, successful the Premier League Summer Series within the course of.
Pochettino says Chelsea can be prepared after they meet Jurgen Klopp’s facet on August 13: “We should be ready. It is not an option.
“There is only one option, to be ready and we are going to be ready. I think today we play a brilliant game, I think it was an exciting game against a very good team like Dortmund.
“I think we deserved to win but it’s not about the result, it’s about the feelings and performance and I think when we scored with Mason at the end it was a relief.
“I think to go back to the feeling, to lose the game was unfair. I think in the end it’s to build something and the feeling after five games on the tour are good.
“Now we need to keep working and evolving our way to play and yes, be ready to start the competition.”
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