Henderson, 25, joined Nottingham Forest on loan for the season and hit out at the club for his “criminal” treatment last season. 1 McCarthy is a Man Utd targetCredit: Getty United already have Tom Heaton on their cards, but the Ten Hag want a goalkeeper more capable of giving David de Gea a challenge. De Gea remains No1 at Old Trafford but Saints stopper McCarthy, 32, is on the shortlist to be his back-up. The one-time England international signed a new three-year contract in his final term at St. Mary, but was replaced at No2 on the south coast by 20-year-old new signing Gavin Bazunu – despite Fraser Forster leaving the club. Bazunu joined from Manchester City this summer and started ahead of McCarthy on the opening day at Tottenham, where the Saints lost 4-1. No formal approach has been made to Southampton at this stage and sources are unsure if United will make a move given what has been described as a scattershot approach to business this summer. The Red Devils are still pushing to sign a striker and a central midfielder before the window closes. Adrien Rabiot and Frenkie de Jong are the players being heavily watched to strengthen the midfield. A move for Frenchman Rabiot, 27, looks the more likely of the two. FREE BET AND SIGN UP OFFERS – BEST NEW CUSTOMER OFFERS United boss John Murtaugh flew to Turin to speak to Rabiot’s mum, who happens to be his agent. While De Jong seems more likely to join Chelsea’s Chelsea, which can offer Champions League football.