By Felix Keith Roy Keane believes that Erik ten Hag will be sacked as Manchester United manager “in the next few months”. Ten Hag guided his side into the fourth round of the FA Cup on Monday night with a comfortable yet unspectacular 2-0 win over Wigan. Diogo Dalot opened the scoring from the edge of the box before Bruno Fernandes made the game safe with a penalty in the second half. But United failed to make the most of their numerous chances against the League One side, with Rasmus Hojlund particularly guilty of poor finishing, while Andre Onana was required to make some crucial stops. Unit…