Manchester United’s first-choice goalkeeper Andre Onana has sustained a hamstring injury that will keep him out of the club’s pre-season tour in the United States and potentially sidelined for up to eight weeks, according to reports from The Athletic and Foot Mercato on 12 July. The 29-year-old Cameroonian will remain in Manchester to rehabilitate and faces a race to be fit for United’s Premier League opener against Arsenal at Old Trafford on 17 August. Hamstring recoveries typically require at least a month, raising the prospect that he could miss the start of the campaign. Manager Ruben Amorim is assessing whether to recruit another goalkeeper during the summer window. Existing options include second-choice Altay Bayindir, veteran Tom Heaton and 21-year-old Radek Vitek. Botafogo keeper John and Aston Villa’s Emiliano Martínez are among the names under consideration, people familiar with the situation said.