Manchester United manager Jose Mourinho says "the relationship between the team and the fans" is key to reviving a fear factor at Old Trafford.
Since Sir Alex Ferguson retired in 2013, United have averaged 2.02 points per Premier League home game, compared to 2.63 in the previous three seasons."If at Old Trafford, a couple of thousand away fans can be more noisy than 70,000, we are in trouble," said Mourinho.
"It means there is no connection."
Mourinho also confirmed that world-record £89m signing Paul Pogba is available to make his debut in Friday's Premier League home game with Southampton,
The 23-year-old midfielder missed the 3-1 season opening victory at Bournemouth due to suspension.
Mourinho also revealed that 34-year-old Swedish striker Zlatan Ibrahimovic has an option for a second year on the one-year deal he signed as a free agent in July.
"His motivation is really high," the manager said. "No doubts he will be here for the next two years."