He has insisted he is in no rush to add to his squad, having been impressed by the performances of youngsters such as Tyler Blackett, Reece James and Michael Keane during the two-week trip. But it is understood that Van Gaal is keen to add an experienced centre-half, with Mats Hummels favoured ahead of Thomas Vermaelen, and another central midfielder to his squad before the transfer deadline on Sept 1.