Manchester United boss Sir Alex Ferguson has said he may not add any more players to his squad this summer.

Ferguson has already signed Mexico’s Javier Hernandez from Guadalajara and defender Chris Smalling from Fulham.

A host of other signings were expected, particularly after chief executive David Gill indicated funds are available to his manager.

“There may be one signing but it’s not easy in the present climate. The market is very difficult,” said Ferguson.

Speaking alongside Gill at a press conference in New York to promote United’s four-game North American tour this summer, Ferguson added: “The structure of our squad is good in terms of ages, the balance, the numbers and there’s a lot of good young players.

Gill added: “The Premier League is bringing in squad limits next year of 25 but there will be unlimited under-21s and other rules and we’ll be taking all that into consideration.”

Ferguson revealed he would not be replacing goalkeeper Ben Foster, instead promoting England Under-21 international Ben Amos, who had been set to be loaned, to the first-team squad alongside Edwin Van der Sar and Tomasz Kuszczak.