Liverpool cannot allow Trent Alexander-Arnold to join a Premier League rival if he returns to England – he’s too good.That’s the view of ex-Southampton star Charlie Austin, who has commented on reports linking Alexander-Arnold with a move away from Real Madrid amid a lack of game time.Alexander-Arnold has been an unused substitute in three of Real’s last five LaLiga gamesGettyAnd Austin – a Liverpool fan – would welcome the right-back returning to Anfield.Asked by Andy Goldstein on talkSPORT Drive whether he would take the defender back — whose departure from his boyhood club last year did not go down well with Reds supporters — Austin hesitated, but ultimately said he would, for one main reason.What did Charlie Austin say about Trent Alexander-Arnold?“If I’m taking him back to the Premier League, do I want to see Trent Alexander-Arnold at another Premier League club? Absolutely not,” the former QPR and West Brom frontman explained.“He would make teams better… sometimes, you have to just park it and if he comes back [to Liverpool], he’s going to have to mend a lot of bridges, but him playing for Manchester City, him playing for Chelsea… that’s a horrible thought, it really is.”Alexander-Arnold has fallen out of favour at Madrid, with Jose Mourinho preferring captain Fede Valverde — a midfielder by trade — at right-back.Austin’s comments come after Alexander-Arnold’s ex-England teammate and fellow right-back Kyle Walker told talkSPORT the 28-year-old would realistically have to sign for a Premier League club other than Liverpool.What did Kyle Walker say about Trent Alexander-Arnold?“Can he go back to Liverpool with the way that he left [Liverpool fans didn’t take kindly to Alexander-Arnold’s departure just before his contract expired]? I’m not too sure,” Walker said.“Do I see him at another club? He’s got to go to one of the big ones: Manchester United, Man City.”Liverpool born and bred, Alexander-Arnold angered the Anfield faithful by running down his contract on Merseyside.The opportunity to join Real Madrid was understandably a hugely appealing one, but he’s generally found it tough going with the 15-time European champions.Alexander-Arnold starred in both of Liverpool’s Premier League title wins to dateGettyTrent might need to leave Madrid to revive England careerHaving been recalled to the England squad after missing out on selection for the World Cup, he’s been an unused substitute for each of Madrid’s last three games in all competitions.Speaking after his international return against Czechia last month, Alexander-Arnold acknowledge that he would need to ‘prove himself’ at club level to stay in Thomas Tuchel‘s plans.“I’ve always believed I can play for England and I always want to,” he told ITV. “That belief’s always been there; it’s just about proving it at club level.“And the manager’s [Tuchel] given me the chance tonight to go out there and play and try to follow what he’s asked of me to the best of my ability. And hopefully he’s happy with how I’ve played.”That 3-0 win at Wembley, however, was the last time Alexander-Arnold completed 90 minutes for club or country.He found himself substituted early in the second half of Madrid’s 1-0 LaLiga win over Villarreal earlier this month and hasn’t featured since.