On loan at Hamburg this season, Karl-Heinz Rummenigge expects the Tottenham-linked teenager to spend another campaign elsewhere next term, whether in the Bundesliga or England.
Green, 19, spent most of last season with in the German fourth tier with the club’s under-23s, with his lone senior appearance coming in the final minutes of a 3-1 Champions League win at CSKA Moscow.
Nevertheless, the American-born teenager’s clear potential saw his international future become the subject of much wrangling over the following months, having moved to Europe at the age of two with his German mother, before US head coach Jurgen Klinsmann managed to secure his services last March.
A surprise inclusion in the World Cup squad, given his lack of experience, the emerging wide man managed to make a significant impact in his 15-minute cameo in Brazil, coming on in extra-time of the last-16 defeat to Belgium to score his side’s consolation goal.
Tipped to make Bayern’s first-team for the coming campaign upon returning from Brazil, Rummenigge revealed at the time that the Bundesliga giants had turned down Premier League offers for their star prospect, amid the likes of the Guardian reporting interest from Tottenham Hotspur.
A move did in fact materialise prior to the close of the transfer window but it was instead a season-long loan switch to German rivals Hamburg, where it was hoped that the US international would accrue some valuable first-team experience to prepare him for life at the Allianz Arena.
Things have not gone at all to plan since, however, with Green enduring a nightmare six months which has seen him make just five league appearances for a total of 113 minutes.
Dropped to the club’s reserves in recent weeks, Rummenigge now accepts that it will be difficult for him to make it into Pep Guardiola’s plans for next season but hopes that another loan might prove more fruitful, with England being a potential destination.
"If, at the end, he comes back -- and it looks like he will come back -- at the end of the season, then we have to sit together and find the best solution for him," he said.
"I don't believe the first step will be here at Bayern. Probably, he will need one more year in a club wherever – in Germany, in England, I don't know – to show his quality because I believe he does have the quality.
“The problem what I'm seeing now is that, unfortunately, for one reason or another, he didn't play regularly at Hamburg," he added. "Hamburg is in a very difficult position. They fired their coach yesterday. That is one more sign that things, unfortunately, at Hamburg are not going well.
“Maybe he is suffering about the total situation of the club and maybe not playing – it is looking like – that he had not a good relationship with the old coach. Maybe that is changing in a better way."
Despite his Hamburg struggles, Green has remained in Klinsmann’s plans with the senior US setup and is a part of the squad for their upcoming friendlies with Denmark and Switzerland.
Speaking to US Soccer last week on his winger's situation, the German said: "At the moment, Julian struggles with Hamburg. It's been a very, very difficult time since he came back after the World Cup, with injuries and not breaking in yet, so I decided to have a first look at him.
“We will have a serious talk and serious look at him and we want to understand exactly what happened in his club situation, but also he needs some support from the senior national team group."
Given Klinsmann’s connections to former club Tottenham, it’s not hard to imagine a scenario where Green ends up at White Hart Lane next season along with international teammate DeAndre Yedlin, especially considering the team’s past reported interest in his signature.
With Mauricio Pochettino’s growing track record for nurturing emerging talent, and the squad in need of some added pace out wide, a move to north London could be the ideal short-term switch to help his development and put his recent struggles behind him.