Liverpool legend Jamie Carragher has once again raised concerns about Manchester United defender Lisandro Martinez, despite praising his “brilliant” ability on the ball. Manchester United manager Erik ten Hag was reunited with Lisandro Martinez after the Red Devils signed him from Ajax in 2022 as part of a £57m deal. Martinez was widely hailed for his debut season at Old Trafford, with the 26-year-old Argentine centre-back striking up a formidable partnership with Raphael Varane. However, the former Ajax star missed the tail end of United’s campaign last season after he suffered a fractured me…