Manchester United centre-back Rio Ferdinand believes the current United squad has the potential to retain their title next season even if no new additions are made.
United have failed to make any major inland in this summer's transfer market with a move for Cesc Fabregas falling flat whilst also failing to convince Thiago Alcantara to join them ahead of Bayern Munich.
This means 20-year-old Uruguayan full-back Guillermo Varela is the only signing under David Moyes, who signed from Atletico Penarol.
Although Wilfried Zaha, who signed for the Old Trafford club in January, has completed his loan spell from Crystal Palace, meaning he is a technically a new United player under Moyes.
However, former England international defender Ferdinand isn't concerned with Moyes' failings as he believes Manchester United can defend their title without further signings.
He told Sky Sports News: "We're confident. If we had to go into the season with the players that we've got now I'd be more than confident and with high hopes of doing well and winning trophies.
"If the manager adds to that and chooses to add to that, then great - but it remains to be seen."
Manchester United may still, however, make waves in the transfer market with Goal.com reporting Moyes is preparing to meet Marouane Fellaini's £22m release clause.
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