Manchester United manager Sir Alex Ferguson believes his team’s home form will be key in deciding whether they can secure a 20th title. u00a0United lost ground in the title race on Wednesday with a 1-0 defeat at Wigan and Manchester City’s 4-0 win over West Bromwich Albion seeing their lead cut to five points.u00a0The champions’ lead could be reduced to two points when City travel to Norwich on Saturday, 24 hours before United entertain Aston Villa at Old Trafford.

Man United’s Javier Hernandez , Michael Carrick and Wayne Rooney react after Wigan’s goal at the DW Stadium in Wigan on Wednesday. Pic/Getty Images