The biggest obstacle standing in the way of a transfer is the importance Pulisic places on playing time, which he's gradually earned with Dortmund since joining the first team in January 2016.
"Pulisic is part of that generation".
But to Mourinho's frustration, thereport suggests that Liverpool are favourites to sign Pulisic, come the end of the season.
Liverpool boss Jurgen Klopp was in charge of Dortmund when Pulisic made the move to Signal Iduna Park three years ago, and he is understood to be very keen on a summer reunion at Anfield. This could work in United's favor, who could use Mkhitaryan in an exchange deal to land Pulisic.
The report claims United also have an interest in his team-mate Julian Weigl and Valencia midfielder Carlos Soler, but Pulisic remains their priortity.More news: Eric Clapton suffering from hearing loss
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Last month BVB director Michael Zorc told Reviersport: "Those experts are being paid to talk a lot".
"I would say that the expectations some Americans put on me is too much", he said. I prefer to stick to the facts.
"I played one year of competitive basketball actually". And when I say ahead, I mean beyond this summer. The likes of Paul Pogba, Victor Lindelof, Anthony Martial, Marcus Rashford and even Romelu Lukaku, are all relatively young and will make Pulisic feel at home.
Pulisic has 11 goals and 14 assists in 78 career appearances for Dortmund, but Honigstein believes the young attacker isn't quite ready to be a like-for-like replacement for Philippe Coutinho.
Despite being born in the US Pulisic has dual USA-Croatia citizenship and has been training at the Dortmund Academy since he was 16. Listening to the the 19-year-old contrast the incredible amount of attention and hope heaped upon him in the States with being "just a good team player, a piece of the puzzle" in one of the Bundesliga's leading clubs, it's clear where his preference lies.
Pulisic moved to Dortmund in 2016 and has been steadily progressing since, while also scoring nine goals in 20 caps for the United States national team despite failing to qualify for the 2018 World Cup.