Manchester United manager Ole Gunnar Solskjaer says there is no “quick fix” to improve his squad.
Pressure is mounting on Solskjaer to make January signings after Wednesday’s 2-0 home defeat by Burnley.
It was a second straight Premier League loss and the players were jeered.
“We’ve had one proper transfer window and we’re trying to do something now,” said Solskjaer, who took over – initially on an interim basis – in December 2018.
During the summer transfer window, United spent over £130m on defenders, bringing in Harry Maguire from Leicester City and Aaron Wan-Bissaka from Crystal Palace, and also signed winger Daniel James from Swansea City.
Solskjaer referenced the squad-building at Liverpool since Jurgen Klopp took charge in October 2015, with the Reds now 16 points clear at the top of the Premier League and the reigning European champions.
“Jurgen Klopp spent four years building his team and they’re doing well now,” said the Norwegian.
“It’s not going be a quick fix – eight or 10 players in the transfer window.
“We can’t react to all the noise outside. There’ll be criticism – you’ve got to take it, you’ve got to be stronger mentally.
“I am, the club is. The staff are very strong mentally and we’re sticking to what we believe in. I’ve got full faith.”